Azelaic Acid Properties and Industrial Sourcing (CAS 123-99-9)
Azelaic Acid (CAS 123-99-9) is a nine-carbon dicarboxylic acid used as a candidate raw material in organic synthesis and in the manufacture of selected resins, plasticizers, adhesives, polyamides and elastomers. Buyers should qualify it through a current specification, analytical methods, lot COA, SDS and application-specific testing—not through the CAS number or a generic use list alone.
Reference properties of Azelaic Acid
| Property | Source-labeled reference | Procurement implication |
|---|---|---|
| Chemical identity | Azelaic Acid / nonanedioic acid; CAS 123-99-9; EC 204-669-1 | Match name, CAS and structure before comparing offers |
| Molekylær formel | C9H16O4 | Do not use formula alone as a unique identity check |
| Molekylvægt | 188.2209 g/mol (NIST) | Use the precision appropriate to the buyer’s calculation and method |
| Condensed structure | HOOC-(CH2)7-COOH | Confirms two terminal carboxylic-acid groups |
| Fusion temperature | 379.7–380.0 K, approximately 106.6–106.9 °C (NIST) | Literature context only; confirm the current release method/range |
| Vandopløselighed | 2.4 g/L at 20 °C in a PubChem compiled record | Verify temperature, pH, solvent system and process conditions |
| InChIKey | BDJRBEYXGGNYIS-UHFFFAOYSA-N | Useful for database and structure matching |
| Canonical SMILES | C(CCCC(=O)O)CCCC(=O)O |
Machine-readable connectivity; not a grade or lot specification |
Primary identity and property references: NIST Chemistry WebBook, NIST phase-change data, PubChem CID 2266 og ECHA substance information.
For a structure-focused explanation, see Azelaic Acid structure, formula and molecular identity.
What is Azelaic Acid used for industrially?
PubChem’s compiled use records list Azelaic Acid in organic synthesis and in selected lacquers, alkyd resins, low-temperature plasticizers, adhesives, polyamides and urethane elastomers. These records establish credible application-screening categories; they do not prove that a particular grade, specification or lot will work in the buyer’s formulation or meet destination-market requirements.
| Application-screening area | Why buyers may evaluate it | Evidence still required |
|---|---|---|
| Organisk syntese | Difunctional carboxylic-acid building block | Reaction route, stoichiometry, assay method, impurities and process validation |
| Polyamides and polyesters | Two terminal acid groups can participate in condensation chemistry | Monomer purity, functionality, color, water and molecular-weight targets |
| Alkyd resins and lacquers | Potential diacid component for a defined resin design | Formulation compatibility, cure behavior, color, stability and performance testing |
| Plasticizers and polyester adhesives | Candidate intermediate for selected ester systems | Exact derivative route, low-temperature target, migration and end-use compliance |
| Urethane elastomer systems | Listed in compiled industrial-use references | Reaction design, functionality, residuals, compatibility and finished-material validation |
Specification fields to confirm before purchase
A useful Azelaic Acid specification should show limits, methods, units and basis. A lot COA should report results against the applicable approved specification. The CAS number does not replace either document.
- Identity test and reference standard or instrumental method.
- Assay/purity limit, analytical method and calculation basis.
- Appearance and color definition with the relevant method or scale.
- Water/moisture test method, units and acceptance limit.
- Acid value or other functionality-related fields required by the process.
- Named related substances, unknown impurity limits and total impurities.
- Metals, residual solvents or other market/process-specific controls where required.
- Sampling, retest/expiry, storage and packaging details from current controlled documents.
How to evaluate a sample or lot
- Compare the supplier specification with the buyer’s critical material attributes.
- Review the lot COA and confirm that methods, units and basis match the specification.
- Confirm the current SDS and destination-specific transport or handling status.
- Run identity, impurity and physical-property checks required by the buyer’s quality system.
- Qualify the sample in the intended reaction or formulation at a controlled scale.
- Approve packaging, storage, change-control and ongoing supply requirements before scale-up.
Regulated-use boundary
The substance identity does not establish pharmaceutical, cosmetic, food or other regulated grade. Specific finished topical medicines containing Azelaic Acid have their own documented formulation, concentration and label; those records do not convert an unspecified raw material into an approved drug ingredient or authorize patient-use instructions.
Azelaic Acid is also not E900. The consolidated EU food-additives regulation identifies E 900 as dimethyl polysiloxane. Longchang will not present CAS 123-99-9 as E900, GRAS or a food preservative based on the removed legacy copy.
Legacy product fields that require current confirmation
The historical Longchang product entry displayed the fields below without a visible method, lot, effective date or current approval status. They are retained here only as RFQ questions—not as current specifications, lot results, packaging commitments or supply promises.
| Historical field | Old page value | Required current confirmation |
|---|---|---|
| Udseende | White/colorless crystalline powder | Controlled wording, method/scale and acceptance range |
| Assay/content | 99.0–100.0%; one displayed result 99.25% | Current limit, method, basis and applicable lot COA |
| Fugt | ≤1.0%; one displayed result 0.38% | Current method, units/basis, limit and lot result |
| Chloride, sulfate, iron and metals | Individual old limits/results | Whether each test remains applicable, plus current methods and limits |
| Emballage | 25 kg/tromle | Current net amount, packaging material/lining, closure and destination |
| Konklusion | “Conforms with enterprise standards” | Named current specification number/version and authorized disposition |
Azelaic Acid RFQ checklist
- Product name and CAS 123-99-9, intended application and destination market.
- Required assay method/basis, appearance/color, water and functionality tests.
- Named impurities, unknown/total impurity limits and any metals or residual-solvent requirements.
- Quantity, sample need, packaging constraints, destination and requested delivery window.
- Required documents: current specification, applicable lot COA, current SDS and any buyer questionnaires.
Request current Azelaic Acid information
Open the Azelaic Acid CAS 123-99-9 sourcing page and request current commercial information.
E-mail info@longchangchemical.com with the application, target specification, quantity, sample request, packaging needs, destination and document requirements.
Frequently asked questions
Is a literature property table a supplier specification?
No. Literature values provide identity and screening context. A supplier specification defines release limits and methods; the applicable lot COA reports the lot’s results.
Does CAS 123-99-9 prove pharmaceutical or cosmetic grade?
No. CAS identifies the substance record, not grade, manufacturing controls, regulatory suitability or finished-product approval.
Can the historical 99% field be used as a current guarantee?
No. The old page did not show a current method, specification version, approval status or lot context. Request current controlled documents.
Is Azelaic Acid food additive E900?
No. EU food-additives legislation identifies E 900 as dimethyl polysiloxane.
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