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Official EU label nameGlossary entry 27806

STEAROXYTRIMETHYLSILANE

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:18748-98-6
EC:242-554-8
Ingredient index records:
STEAROXYTRIMETHYLSILANE
Cosmetic functions: SKIN CONDITIONING, SKIN CONDITIONING - EMOLLIENT

Trimethyl(octadecyloxy)silane

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1 matched or reported name
STEAROXYTRIMETHYLSILANE

Regulatory evidence across markets

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

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.

Check the markets and their sourcesSearch every market for this name

Chemical identity and properties

PubChem 2D chemical structure for CAS 18748-98-6
CAS 18748-98-6PubChem CID 87778

Stearoxytrimethylsilane

IUPAC name
trimethyl(octadecoxy)silane
Molecular formula
C21H46OSi
Molecular weight
342.7 g/mol
Exact mass
342.331792621 Da
Topological polar surface area
9.2 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
1
Covalent units
1
Defined stereocentres
0

Also known as

Trimethyl(octadecyloxy)silaneSilane, trimethyl(octadecyloxy)-stearoxy trimethylsilanestearoxy trimethyl silaneEINECS 242-554-89862TW94B2SILCARE SILICONE 1M71STEAROXYTRIMETHYLSILANE [II]
16 more reported names
STEAROXYTRIMETHYLSILANE (II)stearyloxytrimethylsilaneRefChem:889157Silane, trimethyl(octadecyloxy)STEAROXYTRIMETHYLSILANE [INCI]242-554-8EINECS 242-553-21-Octadecanol, TMS derivativeUNII-9862TW94B21-Octadecanol, O-TMSOctadecoxy-trimethylsilaneTrimethyl stearyloxysilane(Octadecyloxy)trimethylsilane1-TrimethylsilyloxyoctadecaneOctadecan-1-ol, TMS etherOctadecyl trimethylsilyl ether
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.

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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