Acids & Salts Available — Bulk Only

Oleyl Betaine (Oleyldimethyl Betaine)

CAS 871-37-4 · Formula C22H43NO2 · MW 353.6 g/mol

An amphoteric, zwitterionic oleyl-chain surfactant used to build foam and impart conditioning in cleansing systems. It functions as a surfactant, foam booster, and antistatic and conditioning agent, and is documented for cleansing applications in personal-care formulations.

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CAS Number
871-37-4
Formula
C22H43NO2
Molecular Weight
353.6 g/mol
Material Family
Acids & Salts
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
Surfactancy · Cleaning / Degreasing
Functional Roles
OLEYL BETAINE
ANTISTATICCLEANSINGHAIR CONDITIONINGSKIN CONDITIONINGSURFACTANT - CLEANSINGSURFACTANT - FOAM BOOSTING
Applications & Use Cases
  • Surfactant: Primary or co-surfactant in cleansing formulations.
  • Foam booster: Builds and stabilizes foam in surfactant blends.
  • Conditioning: Hair and skin conditioning in personal-care products.
  • Antistatic: Reduces static in hair-care formulations.
Safety & Handling
Full SDS available on request

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.

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Chemical Identity
CAS Number
871-37-4
Molecular Formula
C22H43NO2
Molecular Weight
353.6 g/mol
IUPAC Name
2-[dimethyl(octadec-9-enyl)azaniumyl]acetate
INCI Name
OLEYL BETAINE
PubChem CID
InChI Key
AMRBZKOCOOPYNY-UHFFFAOYSA-N
Synonyms & Trade Names
9-Octadecen-1-aminium, N-(carboxymethyl)-N,N-dimethyl-, inner salt, (9Z)- 2-[Dimethyl(octadec-9-enyl)azaniumyl]acetate
Full Description

Oleyl Betaine (CAS 871-37-4) is an amphoteric surfactant, the inner salt of a carboxymethyl dimethyl oleyl ammonium compound. It functions as a surfactant, foam booster, and antistatic and conditioning agent, and is documented for cleansing applications in personal-care formulations.

Frequently Asked Questions

What is (carboxymethyl) dimethyloleylammonium hydroxide used for?

Also known as oleyl betaine (CAS 871-37-4), it is an amphoteric surfactant used as a primary or co-surfactant in cleansing formulations. It functions as a foam booster, antistatic agent, and hair- and skin-conditioning agent in personal-care products.

What is oleyl betaine also known as?

This material is the inner salt of a carboxymethyl dimethyl oleyl ammonium compound, commonly called oleyl betaine. It carries CAS 871-37-4 and molecular formula C22H43NO2 in the family of amphoteric (betaine) surfactants.

Is oleyl betaine a quaternary ammonium compound?

It is an amphoteric surfactant built on a quaternary ammonium center carrying a carboxymethyl (carboxylate) group, making it an inner salt (betaine) rather than a simple quat. This zwitterionic structure is why it is classed with amphoteric surfactants used as foam boosters and co-surfactants.

What is its role in cleansing formulations?

As an amphoteric surfactant it lowers surface tension, builds and stabilizes foam, and acts as a secondary surfactant that improves mildness and conditioning when blended with anionic primaries. It also provides antistatic and conditioning effects in hair-care blends.

How is oleyl betaine supplied in bulk and what documentation is provided?

It is supplied as a liquid surfactant concentrate in industrial packaging such as drums, totes, and IBCs. A Certificate of Analysis and Safety Data Sheet (SDS) are provided per lot. Contact us with your active-content and volume requirements for a bulk quote.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.