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CAS 541-05-9

CAS 541-05-9 matches 0 EU annex records across Annex II–VI of Regulation 1223/2009.

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Chemical identity and properties

PubChem 2D chemical structure for CAS 541-05-9
CAS 541-05-9PubChem CID 10914

Hexamethylcyclotrisiloxane

Hexamethylcyclotrisiloxane is an organosilicon compound. — ChEBI

IUPAC name
2,2,4,4,6,6-hexamethyl-1,3,5,2,4,6-trioxatrisilinane
Molecular formula
C6H18O3Si3
Molecular weight
222.46 g/mol
Exact mass
222.05637404 Da
Topological polar surface area
27.7 Ų
Hydrogen-bond donors
0
Hydrogen-bond acceptors
3
Covalent units
1
Defined stereocentres
0

Also known as

Cyclotrisiloxane, hexamethyl-Dimethylsiloxane cyclic trimerSDK 10EPV75L8O0RDC 246LS 8120RefChem:786203208-765-4
16 more reported names
C6H18O3Si3Simethicone Impurity 2CCRIS 1326UNII-EPV75L8O0REINECS 208-765-4AI3-62005hexamethyl-1,3,5,2,4,6-trioxatrisilinaneCyclotrisiloxane, 2,2,4,4,6,6-hexamethyl-EC 208-765-4Hexamethylcyclotrisiloxane, 98%HTDJPCNNEPUOOQ-UHFFFAOYSA-Hexamethylcyclotrisiloxane (NIST)CHEBI:189167CYCLOTRISILOXANE, HEXAMETHYLTox21_303233CH7260
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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.

Records for CAS 541-05-9

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How CAS 541-05-9 is used on this site

CAS 541-05-9 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 541-05-9 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.