Emollient
TRIMETHYLPENTYL TRISILOXANE
Safety score · 0–100
Good
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A small silicone fluid used for silky, fast-spreading product feel. Well tolerated; the main concern is environmental persistence.
Trimethylpentyl trisiloxane is a short linear trisiloxane with a trimethylpentyl side-chain, used as a lightweight silicone emollient and spreading agent. Short-chain silicones give very slick, elegant sensory properties and improve pigment dispersion. CIR-reviewed linear silicones are considered safe as used. No EU Annex II/III listing for this specific material. Regulatory and environmental scrutiny on short silicones (D4, D5) has influenced supplier formulation choices, but this pendant-substituted trisiloxane is chemically distinct from the cyclic species under restriction.
Function
Skin benefits
- Silky feel
- Lightweight spread
- Improves product delivery
Known concerns
- Silicone environmental persistence
- Not biodegradable
- Class regulatory scrutiny
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related emollients
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.