Skip to main content
CosIng Checker
CosIng Checker
EU cosmetic ingredients, restrictions and safety
Login
CAS 0 records

CAS 820-66-6

CAS 820-66-6 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

Check this CAS numberBrowse annexes

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
Open full PubChem recordPubChem annotations3D structure image
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.

Records for CAS 820-66-6

0 total
No records found for this CAS number.

How CAS 820-66-6 is used on this site

CAS 820-66-6 is the Chemical Abstracts Service identifier used to pin this page to a specific substance. In the current dataset, 0 EU annex records share this identifier, which helps you cross-check whether the same substance appears under one regulatory context or several.

Use this page when a supplier specification, SDS or raw-material dossier gives you CAS 820-66-6 and you need to see every linked Annex II–VI record in one place. The entry cards above are the quickest route to concentration limits, warnings, annex placement and product-type conditions.