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Official EU label nameGlossary entry 27833

STEARYL BETAINE

This record confirms an official common ingredient name for EU cosmetic product labelling. It does not by itself confirm that the substance is permitted, unrestricted or safe.

Global evidence snapshot

The resolved identity has matching regulatory evidence in 0 of 13 indexed market datasets: 0 country records and 0 EU Annex records. Every result and evidence gap is listed below.

0 markets with evidence
Markets checked
13
Markets with evidence
0
Evidence gaps
13
Resolved identifiers
2

Resolved substance identity

CAS:820-66-6
EC:212-470-6
Ingredient index records:
STEARYL BETAINE
Cosmetic functions: ANTISTATIC, CLEANSING, FOAMING, HAIR CONDITIONING, SKIN CONDITIONING, SURFACTANT - CLEANSING, SURFACTANT - FOAM BOOSTING, VISCOSITY CONTROLLING

(Carboxylatomethyl)dimethyl(octadecyl)ammonium

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1 matched or reported name
STEARYL BETAINE

Regulatory evidence across markets

None of the 13 markets tracked here holds an imported rule under the name STEARYL BETAINE.

That is a statement about this inventory, not about the law: no imported rule is not evidence that a substance is permitted. A rule may exist under a different name, under a CAS or EC number this glossary entry does not carry, or in a dataset not yet imported.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 820-66-6
CAS 820-66-6PubChem CID 101868

Stearylbetaine

The CIR Expert Panel concluded that the eleven alkyl betaines listed below are safe in the present practices of use and concentration in cosmetics, when formulated to be non-irritating...Stearyl Betaine... — Cosmetic Ingredient Review (CIR)

IUPAC name
2-[dimethyl(octadecyl)azaniumyl]acetate
Molecular formula
C22H45NO2
Molecular weight
355.6 g/mol
Exact mass
355.345029678 Da
XLogP3
9.4
Topological polar surface area
40.1 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
2
Covalent units
1
Defined stereocentres
0

Also known as

Stearyl betaineN-StearylbetaineLonzaine 18SStearyldimethylbetaineStearyl dimethyl glycine(Carboxymethyl)octadecyldimethylammonium hydroxide inner salt0J4V7PZ3Q6NSC 9859
16 more reported names
NSC-9859EINECS 212-470-6NSC 36343NSC-363431-Octadecanaminium, N-(carboxymethyl)-N,N-dimethyl-, inner saltN,N-Dimethyl-N-octadecylammonioacetic acid inner saltAmmonium, (carboxymethyl)dimethyloctadecyl-, hydroxide, inner saltN-(Carboxymethyl)-N,N-dimethyl-1-octadecanaminium hydroxide, inner salt1-Octadecanaminium, N-(carboxymethyl)-N,N-dimethyl-, hydroxide, inner saltRefChem:889190STEARYL BETAINE [INCI]1-Octadecanaminium, N-(carboxymethyl)-N,N-dimethyl-, hydroxide, inner salt (9CI)(Carboxylatomethyl)dimethyl(octadecyl)ammoniumAnfoterico SB2-(dimethyl(octadecyl)ammonio)acetate1-Octadecanaminium,N-dimethyl-, hydroxide, inner salt
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External database identifiers

Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.

Additional authoritative substance research

Each link searches that source for this identity. A link is a research route, not a claim that the source holds an exact record. What each source is, and its legal weight

Cosmetic Ingredient Review safety assessmentsFDA Global Substance Registration SystemILO/WHO International Chemical Safety CardsJapan NITE-CHRIPNIOSH Pocket Guide to Chemical HazardsOECD eChemPortalUS EPA CompTox CTX APIs

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Official source and scope

Imported from Commission Implementing Decision (EU) 2025/1175 (dataset version EU 2025/1175). The glossary supplies common ingredient names for the ingredient list required by Article 19(1)(g); it is not an approval or safety list.

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