Alpha-pinene is a bicyclic monoterpene used as a chemical identity and formulation input across several industrial contexts. NIST lists CAS 2437-95-8 with formula C₁₀H₁₆, molecular weight 136.2340 and InChIKey GRWFGVWFFZKLTI-UHFFFAOYSA-N. Because other authoritative records use CAS 80-56-8 for generic alpha-pinene, a buyer should state the required CAS basis, stereochemical composition and analytical method instead of qualifying the material by name alone.

Alpha-Pinene CAS 2437-95-8: Identity, Uses and Sourcing

Alpha-pinene identity at a glance

Identity sources: NIST Chemistry WebBook: CAS 2437-95-8 et PubChem CID 6654.

Why CAS 2437-95-8 and CAS 80-56-8 both appear

NIST assigns CAS 2437-95-8 to an alpha-pinene record that lists the two stereoisomers. PubChem CID 6654 and the FDA food-substance inventory use CAS 80-56-8 for generic (+/−)-alpha-pinene, while PubChem also lists 2437-95-8 among alpha-pinene synonyms. These records support the same molecular formula and connectivity, but they do not prove a particular lot’s optical composition, purity, source or suitability.

For procurement, specify whether the requirement is racemic/unspecified alpha-pinene, a defined enantiomer or a composition range. Ask the supplier to state the CAS shown on the specification and SDS, optical rotation or enantiomeric basis where relevant, assay method and related-terpene limits.

What is alpha-pinene used for?

The appropriate answer depends on the material specification and downstream process. Authoritative identity records describe alpha-pinene as a terpene and include solvent use. The FDA inventory lists alpha-pinene under CAS 80-56-8 with the technical effect “flavoring agent or adjuvant” and cites specific regulations. That inventory entry is not proof that every alpha-pinene lot, CAS label, concentration, finished product or destination market is authorized.

What do searches for alpha-pinene benefits or effects mean?

Many search results discuss laboratory, animal or formulation research. Those studies do not establish a universal human benefit, dose, treatment claim or finished-product safety conclusion. Longchang supplies raw-material information for business qualification; this page does not recommend alpha-pinene for anxiety, inflammation, respiratory conditions, cancer, pain or any other medical use.

How to read the legacy Longchang source record

The historical product entry lists a colorless transparent liquid, boiling point 155–156 °C, density 0.858 g/mL at 25 °C, refractive index n²⁰/D 1.465 and a 0–6 °C storage field. These are source-record values, not a current specification or batch result. Its melting-point row is internally inconsistent and should not be used until a current method and limit are supplied.

Alpha-pinene RFQ checklist

• State “Alpha-Pinene” and the CAS number required by the buyer’s specification.
• Define the stereochemical or optical-rotation requirement where it affects performance or compliance.
• Provide assay basis, analytical method and limits for beta-pinene and other related terpenes.
• Define water, color, density, refractive index, oxidation-related and process-specific limits where relevant.
• Request the current supplier specification, applicable lot COA and current SDS status.
• State quantity, packaging constraints, destination country, intended process and required market documents.

Food-use and regulatory boundary

The U.S. FDA Substances Added to Food inventory lists alpha-pinene under CAS 80-56-8 as a flavoring agent or adjuvant and references 21 CFR provisions, FEMA number 2902 and JECFA flavor number 1329. The FDA page also explains that FEMA assessments are independent determinations. Review the cited regulation and the intended-use conditions; do not convert the inventory entry into an unrestricted approval, grade or finished-product claim.

Regulatory source: FDA Substances Added to Food: Alpha-Pinene.

Request current Alpha-Pinene information

Courriel info@longchangchemical.com with the CAS basis, stereochemical requirement, intended process, specification, quantity, destination and document requirements.

Review the Alpha-Pinene CAS 2437-95-8 product sourcing page.

Frequently asked questions

What is alpha-pinene?

Alpha-pinene is a bicyclic monoterpene with formula C₁₀H₁₆. NIST’s CAS 2437-95-8 record gives molecular weight 136.2340 and the same non-stereochemical InChIKey as the main PubChem alpha-pinene record.

Is CAS 2437-95-8 the same as CAS 80-56-8?

Authoritative databases associate both numbers with alpha-pinene records, but the identifiers can be presented under different generic or stereochemical conventions. A procurement specification should state the required CAS basis, optical composition and analytical method instead of assuming the numbers are interchangeable for every regulatory or technical purpose.

Is alpha-pinene the same as beta-pinene?

No. Alpha-pinene and beta-pinene are structural isomers. A beta-pinene application or specification must not be copied into an alpha-pinene product record.

Does an FDA inventory entry prove this material is FDA-approved?

No. The inventory lists a technical effect and regulatory references under CAS 80-56-8. It does not establish that a particular Longchang lot, specification, concentration, finished product, claim or destination-market use is authorized.