Official EU label nameGlossary entry 16581

METHYL TRIMETHICONE

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

Markets with evidence

Evidence gaps

Resolved identifiers

Resolved substance identity

CAS:17928-28-8

Ingredient index records:

METHYL TRIMETHICONE

Cosmetic functions: HAIR CONDITIONING, SKIN CONDITIONING, SOLVENT

1,1,1,3,5,5,5-Heptamethyl-3-(trimethylsilyloxy)trisiloxane

Open full local profile

1 matched or reported name

METHYL TRIMETHICONE

Regulatory evidence across markets

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

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 sources Search every market for this name

Chemical identity and properties

PubChem 2D chemical structure for CAS 17928-28-8

CAS 17928-28-8PubChem CID 28838

Methyltris(trimethylsiloxy)silane

Methyltris(trimethylsiloxy)silane is a clear colorless liquid. (NTP, 1992) — CAMEO Chemicals

IUPAC name: trimethyl-[methyl-bis(trimethylsilyloxy)silyl]oxysilane

Molecular formula: C10H30O3Si4
Molecular weight: 310.68 g/mol
Exact mass: 310.12720095 Da
Topological polar surface area: 27.7 Å²
Hydrogen-bond donors: 0
Hydrogen-bond acceptors: 3
Covalent units: 1
Defined stereocentres: 0

Also known as

Methyl trimethicone1,1,1,3,5,5,5-Heptamethyl-3-((trimethylsilyl)oxy)trisiloxanemethyl tris(trimethylsiloxy)silaneTrisiloxane, 1,1,1,3,5,5,5-heptamethyl-3-[(trimethylsilyl)oxy]-1,1,1,3,5,5,5-Heptamethyl-3-[(trimethylsilyl)oxy]trisiloxaneUNII-S73ZQI0GXMS73ZQI0GXMEINECS 241-867-7

16 more reported names

Trisiloxane, 1,1,1,3,5,5,5-heptamethyl-3-((trimethylsilyl)oxy)-tris(trimethylsiloxy)methylsilaneTMF-1.5EC 241-867-7Methyl tris-(trimethylsilyloxy)silaneRefChem:158355METHYL TRIMETHICONE [INCI]RGMZNZABJYWAEC-UHFFFAOYSA-N1,1,1,3,5,5,5-heptamethyl-3-trimethylsilanyloxy-trisiloxaneTrisiloxane, 1,1,1,3,5,5,5-heptamethyl-3-(trimethylsiloxy)-CHEBI:1443421,1,1,3,5,5,5-HEPTAMETHYL-3-(TRIMETHYLSILOXY)TRISILOXANEFS-38552,2,4,6,6-pentamethyl-4-[(trimethylsilyl)oxy]-3,5-dioxa-2,4,6-trisilaheptaneDB-044358H1612

Open full PubChem record PubChem annotations 3D structure image

External database identifiers

ChEBI:CHEBI:144342
EPA DTXSID:DTXSID9025669

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 assessments FDA Global Substance Registration System ILO/WHO International Chemical Safety Cards Japan NITE-CHRIP NIOSH Pocket Guide to Chemical Hazards OECD eChemPortal US EPA CompTox CTX APIs

Take this record further

Screen in a formula Open standalone comparison

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.

Open official Decision