Film Former
HYDROGENDIMETHYLSILOXYSILICATE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A reactive silicone resin used to build long-wearing silicone films in makeup and sunscreens. Inert once cured.
Hydrogendimethylsiloxysilicate (CAS 68988-57-8) is a methyl-silicate / methyl-hydrogen silicone resin bearing reactive Si–H groups. In formulation it can hydrosilylate with vinyl-silicones to build crosslinked elastomer films delivering long-wear and water resistance. Handling the raw material requires care — contact with moisture, strong base or certain catalysts can liberate hydrogen gas — but once cured in finished products the polymer is inert, with the standard silicone safety profile (CIR-safe for silicone film formers). Not listed on EU Annex II/III. Environmental persistence is typical silicone concern.
Function
Skin benefits
- Long-wear silicone film
- Water resistance
- Smooth finish
Known concerns
- Raw-material handling (Si-H)
- Not biodegradable
- Limited individual cosmetic publication
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related film formers
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.