Tetra(trimethylsiloxy)silane
- Silicones
- CAS 3555-47-3
- IUPAC: tetrakis(trimethylsilyloxy)silane
Tetra(trimethylsiloxy)silane (CAS 3555-47-3) appears in 1 of the 1,812 car-care products CarCareTruth tracks (as of June 2026).
No GHS health classification at consumer-product concentrations. Low molecular weight silicone ether; not a known skin sensitizer, asthmagen, or Prop 65 listed substance.
Tetra(trimethylsiloxy)silane (CAS 3555-47-3) is a small-molecule silicone compound used as a surface modifier in wax and coating formulations. The four trimethylsiloxy groups on the central silicon atom produce strong hydrophobic surface effects and a characteristic slick, release-enhancing property. Used at low concentrations alongside polydimethylsiloxane and polytrimethylhydrosilylsiloxane in carnauba paste wax formulations. No GHS hazard classification at consumer-product concentrations.
Health & environment profile
- VOC
- no
- 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 Tetra(trimethylsiloxy)silane
- What is Tetra(trimethylsiloxy)silane used for in car care?
- Silicone surface modifier used in wax and coating formulations; contributes hydrophobicity and slick surface properties
- Is Tetra(trimethylsiloxy)silane a VOC?
- No. Tetra(trimethylsiloxy)silane is not classified as a volatile organic compound (VOC).
- Is Tetra(trimethylsiloxy)silane on California's Proposition 65 list?
- No. Tetra(trimethylsiloxy)silane is not on California's Proposition 65 list.
1 product contain this
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.