C7H21O2Si3
221.5 g/mol
Industrial ChemicalDanger
1,1,1,3,5,5,5-Heptamethyltrisiloxane
CAS1873-88-7EC217-496-1
Category
Industrial Chemical
Compound Class
Other
Primary Use
Silicone intermediate and surface modifier
1,1,1,3,5,5,5-Heptamethyltrisiloxane is an organosilicon compound used primarily as a silicone intermediate and surface modifier. It features a trisiloxane backbone with methyl substituents, contributing to its low surface tension and hydrophobic properties.
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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UV absorber for polymers
Safety Reference
Danger
H225Highly flammable liquid and vapour
H226Flammable liquid and vapour
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 1,1,1,3,5,5,5-Heptamethyltrisiloxane (CAS 1873-88-7) is 2931.90.
HS code (international, 6-digit)
2931.90
EU CN code (8-digit)
2931 90 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
InChIKey
SWGZAKPJNWCPRY-UHFFFAOYSA-N
SMILES
C[Si](O[Si](C)(C)C)O[Si](C)(C)C
Synonyms (12)
- HEPTAMETHYL TRISILOXANE (USP-RS)
- HPTSO Heptamethyltrisiloxane
- heptamethyl trisiloxane
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