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CAS 18684-11-2

CAS 18684-11-2 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

Chemical identity and properties

PubChem 2D chemical structure for CAS 18684-11-2
CAS 18684-11-2PubChem CID 87750

1-Octadecanaminium, N,N,N-trimethyl-, methyl sulfate (1:1)

The CIR Expert Panel concluded the following ingredients are safe in the present practices of use and concentration described in the safety assessment when formulated to be non-irritating...Steartrimonium Methosulfate... Cosmetic Ingredient Review (CIR)

IUPAC name
methyl sulfate;trimethyl(octadecyl)azanium
Molecular formula
C22H49NO4S
Molecular weight
423.7 g/mol
Exact mass
423.33823022 Da
Topological polar surface area
74.8 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
4
Covalent units
2
Defined stereocentres
0

Also known as

STEARTRIMONIUM METHOSULFATETrimethylstearylammonium methyl sulfateUNII-83454CS6TREMPIGEN CMEINECS 242-501-9Trimethylstearylammonium methylsulfateTrimethyloctadecylammonium methosulfateTrimethyloctadecylammonium, methyl sulfate
14 more reported names
1-Octadecanaminium, N,N,N-trimethyl-, methyl sulfateStearyl trimethylammonium methyl sulfateSTEARYLTRIMETHYLAMMONIUM METHYL SULFATEOCTADECYLTRIMETHYLAMMONIUM METHYL SULFATEN-OCTADECYL-N,N,N-TRIMETHYLAMMONIUM METHOSULFATERefChem:76738STEARTRIMONIUM METHOSULFATE [INCI]242-501-9Trimethyl(octadecyl)ammonium methyl sulphateStearyltrimonium methosulfateAmmonium, trimethyloctadecyl-, methyl sulfateN,N,N-Trimethyl-1-octadecanaminium methyl sulfaten,n,n-trimethyloctadecan-1-aminium methyl sulfateWYTNTFGZBBTWNR-UHFFFAOYSA-M
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 18684-11-2

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No records found for this CAS number.

How CAS 18684-11-2 is used on this site

CAS 18684-11-2 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 18684-11-2 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.