Triethoxy(methyl)silane
- Ceramic (SiO₂)
- CAS 2031-67-6
- IUPAC: triethoxy(methyl)silane
CarCareTruth tracks Triethoxy(methyl)silane (CAS 2031-67-6) as a car-care ingredient. It is classified as a VOC.
Classified as flammable liquid (H225) at the substance level — drives the mixture-level H225 when present as bulk carrier. Releases ethanol on hydrolysis, contributing to volatile-solvent exposure during cure. Ingredient-level eye and skin irritation are not classified at the mixture level for SONAX PROFILINE PPF + Vinyl Ceramic per SDS §2 (mixture carries H319 alone among health codes); the H319 trigger originates from the formulated mixture rather than this ingredient in isolation.
Triethoxy(methyl)silane (CAS 2031-67-6) is a trifunctional alkoxysilane used as the primary bulk carrier in silane-based ceramic coatings designed for paint protection film and vinyl wrap. The three ethoxy groups hydrolyze on contact with atmospheric moisture, releasing ethanol and producing methylsilanetriol — which then condenses with adjacent silane species (and any surface silanols on the film) to form the crosslinked siloxane network of the cured coating.
Health: The pure substance carries H225 (flammable liquid Cat 2) at the substance level, which is the dominant physical-hazard driver when this silane is present as bulk carrier. On hydrolysis, releases ethanol — a volatile solvent. The ingredient does not carry standalone respiratory sensitizer classification.
Environment: Not classified as aquatically toxic at the carrier-use concentration. Hydrolysis products (ethanol + methylsilanetriol) are water-soluble and biodegrade. The cured silane condensate integrates into the coating film and remains bonded to the protected surface.
Health & environment profile
- VOC
- yes
- Prop 65 listed
- no
- Asthmagen
- no
- EPA Safer Choice
- no
- Aquatic toxicity
- no
- Biodegradable
- no
- Bioaccumulative
- no
- Persistent
- no
- Ozone depleting
- no
- Microplastic
- no
- PFAS
- no
- Env. score
- 4/5
Common questions about Triethoxy(methyl)silane
- What is Triethoxy(methyl)silane used for in car care?
- Trifunctional alkoxysilane carrier and reactive crosslinker in silane-based PPF and ceramic coatings
- Is Triethoxy(methyl)silane a VOC?
- Yes. Triethoxy(methyl)silane is classified as a volatile organic compound (VOC).
- Is Triethoxy(methyl)silane on California's Proposition 65 list?
- No. Triethoxy(methyl)silane is not on California's Proposition 65 list.
No products on file contain this (yet)
Related
Health and environment notes translate the manufacturer Safety Data Sheet, the GHS classification, and authoritative regulatory listings (California Prop 65, EPA). Not medical advice. They describe the ingredient itself; whether a hazard applies to a finished product depends on its concentration and how it's used.