{"id":3448,"date":"2024-07-12T06:47:26","date_gmt":"2024-07-12T06:47:26","guid":{"rendered":"https:\/\/pharm.sinocurechem.com\/?p=3448"},"modified":"2024-07-12T06:47:26","modified_gmt":"2024-07-12T06:47:26","slug":"4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety","status":"publish","type":"post","link":"https:\/\/longchangextracts.com\/fr\/4-structure-de-lhydroxybenzaldehyde-synthese-applications-et-securite\/","title":{"rendered":"4-Hydroxybenzald\u00e9hyde : structure, synth\u00e8se, applications et s\u00e9curit\u00e9"},"content":{"rendered":"<p class=\"MsoNormal\" style=\"text-align: left;\" align=\"center\"><span style=\"text-indent: 0pt; font-family: Georgia; font-weight: bold; font-size: 14pt;\">1. <\/span><b style=\"text-indent: 0pt;\"><span style=\"font-family: Georgia; font-size: 14pt;\">Structure et propri\u00e9t\u00e9s chimiques<\/span><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Structure mol\u00e9culaire<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde, \u00e9galement connu sous le nom de p-hydroxybenzald\u00e9hyde, poss\u00e8de un anneau benz\u00e9nique avec deux groupes fonctionnels :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Un groupe hydroxyle (-OH) en position para (carbone 4).<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Un groupe ald\u00e9hyde (-CHO) en position para par rapport au groupe hydroxyle.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">La formule structurelle peut \u00eatre repr\u00e9sent\u00e9e comme suit :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">\u00a0\u00a0\u00a0\u00a0OH<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">\u00a0\u00a0\u00a0\u00a0\u00a0|<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">\u00a0\u00a0C6H4<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">\u00a0\u00a0\u00a0\u00a0\u00a0|<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">\u00a0\u00a0\u00a0CHO<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Ce positionnement conf\u00e8re au 4-Hydroxybenzald\u00e9hyde son profil de r\u00e9activit\u00e9 unique.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Propri\u00e9t\u00e9s physiques<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Aspect : Poudre cristalline blanche \u00e0 jaune clair.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Formule mol\u00e9culaire : C7H6O2.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Poids mol\u00e9culaire : 122,12 g\/mol.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Point de fusion : 115-118 \u00b0C. Le point de fusion indique la temp\u00e9rature \u00e0 laquelle la forme solide du 4-Hydroxybenzald\u00e9hyde passe \u00e0 l'\u00e9tat liquide.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Point d'\u00e9bullition : 191-192 \u00b0C. C'est la temp\u00e9rature \u00e0 laquelle le 4-Hydroxybenzald\u00e9hyde passe de l'\u00e9tat liquide \u00e0 l'\u00e9tat gazeux.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Densit\u00e9 : 1,226 g\/cm\u00b3. Cette propri\u00e9t\u00e9 d\u00e9crit la masse par unit\u00e9 de volume du 4-Hydroxybenzald\u00e9hyde.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Indice de r\u00e9fraction : 1.579. Cet indice indique comment la lumi\u00e8re se propage dans le compos\u00e9.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Solubilit\u00e9<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Solubilit\u00e9 dans l'eau : L\u00e9g\u00e8rement soluble. Le groupe hydroxyle augmente la solubilit\u00e9 dans l'eau par rapport aux autres benzald\u00e9hydes.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Solvants organiques : Soluble dans l'\u00e9thanol, l'\u00e9ther et le chloroforme. Cette grande solubilit\u00e9 dans les solvants organiques en fait un produit polyvalent pour la synth\u00e8se organique.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Propri\u00e9t\u00e9s spectroscopiques<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Spectroscopie UV-Vis : Pr\u00e9sente des pics d'absorption caract\u00e9ristiques dus \u00e0 l'anneau aromatique et au syst\u00e8me conjugu\u00e9.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Spectroscopie IR :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Large bande autour de 3200-3600 cm-\u00b9 due \u00e0 des vibrations d'\u00e9tirement O-H.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Pic important autour de 1680-1700 cm-\u00b9 d\u00fb \u00e0 la vibration d'\u00e9tirement C=O du groupe ald\u00e9hyde.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Pics dans la r\u00e9gion de 1400-1600 cm-\u00b9 correspondant aux vibrations d'\u00e9tirement C=C de l'anneau benz\u00e9nique.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Spectroscopie RMN :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">RMN du proton (RMN \u00b9H) : Le proton de l'ald\u00e9hyde appara\u00eet comme un singulet autour de 9-10 ppm. Les protons aromatiques apparaissent g\u00e9n\u00e9ralement entre 6 et 8 ppm, le proton hydroxyle apparaissant autour de 4-5 ppm.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">RMN du carbone 13 (RMN \u00b9\u00b3C) : Le carbone ald\u00e9hyde pr\u00e9sente un pic autour de 190-200 ppm, et les carbones aromatiques apparaissent dans la plage de 110-160 ppm.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">R\u00e9activit\u00e9 chimique<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">R\u00e9activit\u00e9 des ald\u00e9hydes : Le groupe -CHO peut participer \u00e0 des r\u00e9actions d'addition nucl\u00e9ophile, d'oxydation en acides carboxyliques et de r\u00e9duction en alcools.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">R\u00e9activit\u00e9 des hydroxyles : Le groupe -OH peut subir des r\u00e9actions ph\u00e9noliques typiques, notamment l'est\u00e9rification, l'\u00e9th\u00e9rification et la substitution aromatique \u00e9lectrophile.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Substitution aromatique \u00e9lectrophile : Le groupe hydroxyle active le cycle benz\u00e9nique en faveur de la substitution aromatique \u00e9lectrophile, en particulier en positions ortho et para par rapport au groupe hydroxyle.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Stabilit\u00e9<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde est relativement stable dans des conditions normales, mais il doit \u00eatre conserv\u00e9 dans un endroit frais et sec, \u00e0 l'abri d'agents oxydants puissants. L'exposition \u00e0 la lumi\u00e8re et \u00e0 l'air peut entra\u00eener une oxydation et une d\u00e9gradation progressives, affectant sa puret\u00e9 et son efficacit\u00e9.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Produits d\u00e9riv\u00e9s<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde peut \u00eatre modifi\u00e9 chimiquement pour produire divers d\u00e9riv\u00e9s :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Acide 4-hydroxybenzo\u00efque : Par oxydation du groupe ald\u00e9hyde.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">4-M\u00e9thoxybenzald\u00e9hyde : par m\u00e9thylation du groupe hydroxyle.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Bases de Schiff : Form\u00e9es par condensation avec des amines.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Ces d\u00e9riv\u00e9s \u00e9largissent l'utilit\u00e9 du 4-Hydroxybenzald\u00e9hyde dans diff\u00e9rentes applications, notamment les produits pharmaceutiques, les parfums et la synth\u00e8se organique.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 0.0000pt; mso-para-margin-left: 0.0000gd; text-indent: 0.0000pt; mso-char-indent-count: 0.0000; text-autospace: ideograph-numeric; mso-pagination: none; mso-list: l1 level1 lfo1;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 14.0000pt; mso-font-kerning: 1.0000pt;\">2.\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 14pt;\">Synth\u00e8se du 4-Hydroxybenzald\u00e9hyde<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde peut \u00eatre synth\u00e9tis\u00e9 par plusieurs m\u00e9thodes, chacune ayant ses avantages en fonction de la puret\u00e9 requise, du rendement et de l'application sp\u00e9cifique. Voici quelques m\u00e9thodes de synth\u00e8se courantes :<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l2 level1 lfo2;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">1)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Oxydation du 4-Hydroxytolu\u00e8ne (p-Cr\u00e9sol)<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">L'une des m\u00e9thodes les plus simples consiste \u00e0 oxyder le 4-hydroxytolu\u00e8ne :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Mat\u00e9riau de d\u00e9part : p-cr\u00e9sol (4-hydroxytolu\u00e8ne).<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Agents oxydants : Les agents oxydants courants sont le permanganate de potassium (KMnO\u2084), le trioxyde de chrome (CrO\u2083) ou le dioxyde de mangan\u00e8se (MnO\u2082).<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Proc\u00e9dure :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Dissoudre le p-cr\u00e9sol dans un solvant appropri\u00e9, tel que l'eau ou un m\u00e9lange d'eau et de solvant organique.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Ajouter lentement l'agent oxydant tout en maintenant la temp\u00e9rature de r\u00e9action.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Agiter le m\u00e9lange r\u00e9actionnel jusqu'\u00e0 ce que l'oxydation soit compl\u00e8te.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Filtrer le m\u00e9lange pour \u00e9liminer tout pr\u00e9cipit\u00e9 et purifier le produit par recristallisation ou distillation.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l2 level1 lfo2;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">2)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Hydrolyse de l'alcool 4-hydroxybenzyle<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">L'hydrolyse de l'alcool 4-hydroxybenzyle est une autre m\u00e9thode pour obtenir le 4-Hydroxybenzald\u00e9hyde :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Mat\u00e9riau de d\u00e9part : Alcool 4-hydroxybenzyle.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">R\u00e9actifs : Solution acide aqueuse (telle que l'acide chlorhydrique, HCl) ou quantit\u00e9 catalytique d'un acide.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Proc\u00e9dure :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Dissoudre l'alcool 4-hydroxybenzyle dans une solution acide.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Chauffer le m\u00e9lange \u00e0 reflux.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Une fois la r\u00e9action termin\u00e9e, refroidir le m\u00e9lange et extraire le produit.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Purifier le 4-Hydroxybenzald\u00e9hyde par recristallisation.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l2 level1 lfo2;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">3)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Purification<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Apr\u00e8s la synth\u00e8se, le 4-Hydroxybenzald\u00e9hyde est g\u00e9n\u00e9ralement purifi\u00e9 pour obtenir le niveau de puret\u00e9 souhait\u00e9 :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Recristallisation : Dissoudre le produit brut dans une quantit\u00e9 minimale de solvant chaud (par exemple, de l'\u00e9thanol ou de l'eau) et laisser refroidir lentement. Des cristaux de 4-Hydroxybenzald\u00e9hyde pur se forment.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Distillation : Pour la purification par distillation, la distillation sous vide peut \u00eatre utilis\u00e9e pour \u00e9viter la d\u00e9composition \u00e0 haute temp\u00e9rature.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Chromatographie : La chromatographie sur colonne peut \u00eatre utilis\u00e9e pour une purification plus pouss\u00e9e si n\u00e9cessaire.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 0.0000pt; mso-para-margin-left: 0.0000gd; text-indent: 0.0000pt; mso-char-indent-count: 0.0000; text-autospace: ideograph-numeric; mso-pagination: none; mso-list: l1 level1 lfo1;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 14.0000pt; mso-font-kerning: 1.0000pt;\">3.\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 14pt;\">Applications du 4-Hydroxybenzald\u00e9hyde<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l0 level1 lfo3;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">1)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Produits pharmaceutiques<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Interm\u00e9diaire dans la synth\u00e8se des m\u00e9dicaments :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde est un interm\u00e9diaire cl\u00e9 dans la synth\u00e8se de plusieurs compos\u00e9s pharmaceutiques.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Elle est utilis\u00e9e dans la production d'agents antihypertenseurs, de m\u00e9dicaments anti-inflammatoires et de compos\u00e9s antimicrobiens. Par exemple, c'est un pr\u00e9curseur dans la synth\u00e8se de la 4-Hydroxyph\u00e9nylglycine, qui est utilis\u00e9e dans la fabrication de certains antibiotiques.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">R\u00e9actif analytique :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Il est utilis\u00e9 comme agent de d\u00e9rivation en chimie analytique pour la d\u00e9termination quantitative de diverses substances pharmaceutiques.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Sa capacit\u00e9 \u00e0 former des bases de Schiff avec des amines le rend utile pour la d\u00e9tection et l'analyse de m\u00e9dicaments contenant des amines.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l0 level1 lfo3;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">2)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">2. Ar\u00f4mes et parfums<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Compos\u00e9 aromatique :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde est utilis\u00e9 comme agent aromatique dans l'industrie alimentaire en raison de son agr\u00e9able odeur d'amande.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Il entre dans la composition de diverses fragrances utilis\u00e9es dans les parfums, les savons et les cosm\u00e9tiques.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Synth\u00e8se de la vanilline :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">C'est un interm\u00e9diaire important dans la synth\u00e8se de la vanilline (4-Hydroxy-3-m\u00e9thoxybenzald\u00e9hyde), l'un des agents aromatiques les plus populaires utilis\u00e9s dans les produits alimentaires, les boissons et les produits pharmaceutiques.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l0 level1 lfo3;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">3)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Synth\u00e8se organique<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Bloc de construction :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde est un \u00e9l\u00e9ment de base pr\u00e9cieux dans la synth\u00e8se organique, contribuant \u00e0 la construction de mol\u00e9cules plus complexes.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Il est utilis\u00e9 dans la synth\u00e8se de compos\u00e9s h\u00e9t\u00e9rocycliques, qui ont des applications dans les domaines pharmaceutique et agrochimique.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">R\u00e9actions de couplage crois\u00e9 :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Il participe aux r\u00e9actions de couplage de Suzuki et de Heck, facilitant la formation de liaisons carbone-carbone essentielles \u00e0 la synth\u00e8se de compos\u00e9s biaryliques et d'autres structures complexes.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l0 level1 lfo3;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">4)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Recherche biologique<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">\u00c9tudes d'inhibition enzymatique :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde est utilis\u00e9 en recherche biochimique pour \u00e9tudier l'inhibition d'enzymes sp\u00e9cifiques.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Elle permet de comprendre la fonction et la r\u00e9gulation des enzymes, ce qui est crucial pour le d\u00e9veloppement de m\u00e9dicaments et les interventions th\u00e9rapeutiques.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Recherche sur les antioxydants :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Il est \u00e9tudi\u00e9 pour ses propri\u00e9t\u00e9s antioxydantes, contribuant aux \u00e9tudes sur le stress oxydatif et les maladies qui y sont li\u00e9es.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Sa capacit\u00e9 \u00e0 pi\u00e9ger les radicaux libres en fait un candidat pour la recherche dans la pr\u00e9vention et le traitement des conditions associ\u00e9es aux dommages oxydatifs.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l0 level1 lfo3;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">5)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Industrie des polym\u00e8res<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Additif polym\u00e8re :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Il est utilis\u00e9 comme pr\u00e9curseur dans la synth\u00e8se des r\u00e9sines ph\u00e9noliques et d'autres mat\u00e9riaux polym\u00e8res.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Ces polym\u00e8res sont utilis\u00e9s dans les rev\u00eatements, les adh\u00e9sifs et les mat\u00e9riaux composites, offrant des propri\u00e9t\u00e9s m\u00e9caniques et thermiques am\u00e9lior\u00e9es.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Stabilisateurs :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Le 4-Hydroxybenzald\u00e9hyde peut agir comme stabilisateur dans les processus de polym\u00e9risation, am\u00e9liorant ainsi la stabilit\u00e9 et les performances des produits polym\u00e8res finaux.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l0 level1 lfo3;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">6)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Produits agrochimiques<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Pesticides et herbicides :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">C'est un pr\u00e9curseur dans la synth\u00e8se de divers produits agrochimiques, y compris les pesticides et les herbicides.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Ces compos\u00e9s sont essentiels \u00e0 la lutte contre les parasites et \u00e0 l'am\u00e9lioration de la productivit\u00e9 agricole.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 21.2500pt; mso-para-margin-left: 0.0000gd; text-indent: -21.2500pt; mso-char-indent-count: 0.0000; mso-list: l0 level1 lfo3;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">7)\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 12pt;\">Colorants et pigments<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Synth\u00e8se des colorants :<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Il est utilis\u00e9 dans la production de colorants azo\u00efques et d'autres colorants.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Ces colorants trouvent des applications dans les textiles, les encres et les rev\u00eatements, offrant des couleurs vives et durables.<\/span><\/p>\n<p class=\"MsoNormal\" style=\"margin-left: 0.0000pt; mso-para-margin-left: 0.0000gd; text-indent: 0.0000pt; mso-char-indent-count: 0.0000; text-autospace: ideograph-numeric; mso-pagination: none; mso-list: l1 level1 lfo1;\"><!-- [if !supportLists]--><span style=\"font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-weight: bold; font-size: 14.0000pt; mso-font-kerning: 1.0000pt;\">4.\u00a0<\/span><!--[endif]--><b><span style=\"font-family: Georgia; font-size: 14pt;\">S\u00e9curit\u00e9 et manipulation<\/span><\/b><b><\/b><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Peut provoquer une irritation de la peau et des yeux ; nocif en cas d'ingestion ou d'inhalation.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Utiliser des gants, des lunettes de protection et des blouses de laboratoire pour \u00e9viter tout contact.<\/span><\/p>\n<p class=\"MsoNormal\"><span style=\"mso-spacerun: 'yes'; font-family: Georgia; mso-fareast-font-family: \u5b8b\u4f53; font-size: 12.0000pt; mso-font-kerning: 1.0000pt;\">Conserver dans un endroit frais et sec, \u00e0 l'\u00e9cart de substances incompatibles telles que les oxydants puissants.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>1. Chemical Structure and Properties Molecular Structure 4-Hydroxybenzaldehyde, also known as p-hydroxybenzaldehyde, has a benzene ring with two functional groups: A hydroxyl group (-OH) at the para position (carbon 4). An aldehyde group (-CHO) at the para position relative to the hydroxyl group. The structural formula can be represented as: \u00a0\u00a0\u00a0\u00a0OH \u00a0\u00a0\u00a0\u00a0\u00a0| \u00a0\u00a0C6H4 \u00a0\u00a0\u00a0\u00a0\u00a0| \u00a0\u00a0\u00a0CHO [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>4-Hydroxybenzaldehyde: Structure, Synthesis, Applications, and Safety - China Chemical Manufacturer<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangextracts.com\/fr\/4-structure-de-lhydroxybenzaldehyde-synthese-applications-et-securite\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"4-Hydroxybenzaldehyde: Structure, Synthesis, Applications, and Safety - China Chemical Manufacturer\" \/>\n<meta property=\"og:description\" content=\"1. Chemical Structure and Properties Molecular Structure 4-Hydroxybenzaldehyde, also known as p-hydroxybenzaldehyde, has a benzene ring with two functional groups: A hydroxyl group (-OH) at the para position (carbon 4). An aldehyde group (-CHO) at the para position relative to the hydroxyl group. The structural formula can be represented as: \u00a0\u00a0\u00a0\u00a0OH \u00a0\u00a0\u00a0\u00a0\u00a0| \u00a0\u00a0C6H4 \u00a0\u00a0\u00a0\u00a0\u00a0| \u00a0\u00a0\u00a0CHO [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/longchangextracts.com\/fr\/4-structure-de-lhydroxybenzaldehyde-synthese-applications-et-securite\/\" \/>\n<meta property=\"og:site_name\" content=\"China Chemical Manufacturer\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-12T06:47:26+00:00\" \/>\n<meta name=\"author\" content=\"longcha9\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"longcha9\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/\",\"url\":\"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/\",\"name\":\"4-Hydroxybenzaldehyde: Structure, Synthesis, Applications, and Safety - China Chemical Manufacturer\",\"isPartOf\":{\"@id\":\"https:\/\/longchangextracts.com\/#website\"},\"datePublished\":\"2024-07-12T06:47:26+00:00\",\"dateModified\":\"2024-07-12T06:47:26+00:00\",\"author\":{\"@id\":\"https:\/\/longchangextracts.com\/#\/schema\/person\/80933ac6926ad63fea74ec33f8d04869\"},\"breadcrumb\":{\"@id\":\"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/#breadcrumb\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/longchangextracts.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"4-Hydroxybenzaldehyde: Structure, Synthesis, Applications, and Safety\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/longchangextracts.com\/#website\",\"url\":\"https:\/\/longchangextracts.com\/\",\"name\":\"China Chemical Manufacturer\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/longchangextracts.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"fr-FR\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/longchangextracts.com\/#\/schema\/person\/80933ac6926ad63fea74ec33f8d04869\",\"name\":\"longcha9\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/longchangextracts.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/c1e84ee0759373263198c58e8f338f80?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/c1e84ee0759373263198c58e8f338f80?s=96&d=mm&r=g\",\"caption\":\"longcha9\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"4-Hydroxybenzaldehyde : structure, synth\u00e8se, applications et s\u00e9curit\u00e9 - China Chemical Manufacturer","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/longchangextracts.com\/fr\/4-structure-de-lhydroxybenzaldehyde-synthese-applications-et-securite\/","og_locale":"fr_FR","og_type":"article","og_title":"4-Hydroxybenzaldehyde: Structure, Synthesis, Applications, and Safety - China Chemical Manufacturer","og_description":"1. Chemical Structure and Properties Molecular Structure 4-Hydroxybenzaldehyde, also known as p-hydroxybenzaldehyde, has a benzene ring with two functional groups: A hydroxyl group (-OH) at the para position (carbon 4). An aldehyde group (-CHO) at the para position relative to the hydroxyl group. The structural formula can be represented as: \u00a0\u00a0\u00a0\u00a0OH \u00a0\u00a0\u00a0\u00a0\u00a0| \u00a0\u00a0C6H4 \u00a0\u00a0\u00a0\u00a0\u00a0| \u00a0\u00a0\u00a0CHO [&hellip;]","og_url":"https:\/\/longchangextracts.com\/fr\/4-structure-de-lhydroxybenzaldehyde-synthese-applications-et-securite\/","og_site_name":"China Chemical Manufacturer","article_published_time":"2024-07-12T06:47:26+00:00","author":"longcha9","twitter_card":"summary_large_image","twitter_misc":{"\u00c9crit par":"longcha9","Dur\u00e9e de lecture estim\u00e9e":"6 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/","url":"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/","name":"4-Hydroxybenzaldehyde : structure, synth\u00e8se, applications et s\u00e9curit\u00e9 - China Chemical Manufacturer","isPartOf":{"@id":"https:\/\/longchangextracts.com\/#website"},"datePublished":"2024-07-12T06:47:26+00:00","dateModified":"2024-07-12T06:47:26+00:00","author":{"@id":"https:\/\/longchangextracts.com\/#\/schema\/person\/80933ac6926ad63fea74ec33f8d04869"},"breadcrumb":{"@id":"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/#breadcrumb"},"inLanguage":"fr-FR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/longchangextracts.com\/4-hydroxybenzaldehyde-structure-synthesis-applications-and-safety\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/longchangextracts.com\/"},{"@type":"ListItem","position":2,"name":"4-Hydroxybenzaldehyde: Structure, Synthesis, Applications, and Safety"}]},{"@type":"WebSite","@id":"https:\/\/longchangextracts.com\/#website","url":"https:\/\/longchangextracts.com\/","name":"Fabricant chinois de produits chimiques","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/longchangextracts.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"fr-FR"},{"@type":"Person","@id":"https:\/\/longchangextracts.com\/#\/schema\/person\/80933ac6926ad63fea74ec33f8d04869","name":"longcha9","image":{"@type":"ImageObject","inLanguage":"fr-FR","@id":"https:\/\/longchangextracts.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/c1e84ee0759373263198c58e8f338f80?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/c1e84ee0759373263198c58e8f338f80?s=96&d=mm&r=g","caption":"longcha9"}}]}},"_links":{"self":[{"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/posts\/3448"}],"collection":[{"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/comments?post=3448"}],"version-history":[{"count":0,"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/posts\/3448\/revisions"}],"wp:attachment":[{"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/media?parent=3448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/categories?post=3448"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/longchangextracts.com\/fr\/wp-json\/wp\/v2\/tags?post=3448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}