ISOSTEARIC ACID- ▸ Emulsifier: emulsifying and cleansing agent in cosmetics
- ▸ Ester intermediate: feedstock for emollient ester synthesis
- ▸ Corrosion inhibitor: corrosion-inhibiting additive
- ▸ Surface modifier: surfactant and surface-modifying agent
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →Isostearic acid (CAS 30399-84-9) is a branched-chain saturated C18 (octadecanoic) fatty acid that remains liquid and oxidatively stable. Per its CIR/PubChem classification it is used as an emulsifier, surfactant, and binding agent, and as a corrosion inhibitor and chemical intermediate.
Frequently Asked Questions
What is another name for isostearic acid?
Isostearic acid (CAS 30399-84-9) is a branched-chain isomer of stearic (octadecanoic) acid; it is sometimes referred to as branched C18 fatty acid or isooctadecanoic acid. It differs from straight-chain stearic acid in remaining liquid and oxidatively stable. Lot identity is confirmed on the Certificate of Analysis.
What is the difference between isostearic acid and stearic acid?
Both are C18 saturated fatty acids (C18H36O2), but isostearic acid is branched while stearic acid is straight-chain. The branching keeps isostearic acid liquid at room temperature and oxidatively stable, whereas stearic acid is a waxy solid. This makes isostearic acid useful as a liquid emulsifier and ester feedstock.
What is isostearic acid used for?
Isostearic acid is used as an emulsifier, surfactant, and binding agent in cosmetics, as a feedstock for emollient ester synthesis, as a corrosion-inhibiting additive, and as a surface-modifying agent and chemical intermediate. Its liquid, stable nature makes it versatile across formulated and industrial systems.
What is the CAS number and HS code for isostearic acid?
The CAS number is 30399-84-9, the molecular formula is C18H36O2, and the HS classification is 2915.90 (saturated acyclic monocarboxylic acids and esters, other). Specification is confirmed per lot on the Certificate of Analysis.
How is isostearic acid supplied in bulk and what is the cost?
We supply isostearic acid in bulk industrial packaging such as drums and IBC totes, with a CoA and SDS per lot. Pricing is volume- and packaging-dependent; request a current bulk quote with your quantity and ship-to.
