Tetrakis(trimethylsiloxy)silane
CAS 3555-47-3
Trisiloxane, 1,1,1,5,5,5-hexamethyl-3,3-bis[(trimethylsilyl)oxy]-
EPA and Census publish no US supply data for this chemical.
US productionNot reported
Top sourceNo public record
This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.
Why supply is unknownWhere It Comes From
EPA and Census publish no US supply data for this chemical.
Why It Matters
No EPA sector or FDA product records name a use for this chemical.
Vendor Pricing
$0.39/gCombi-Blocks, Inc.
CountryUnited States
Pack$195.00 / 500 g
Purity98%
Vendors13 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
12 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| BLD Pharmatech Ltd. | China | $0.44 | 500 g | 98% |
| A2B Chem LLC | United States | $0.44 | 100 g | 97% |
| Aaron Chemicals LLC | Hong Kong | $0.46 | 500 g | — |
| Angene Chemical | China → Hong Kong | $0.46 | 500 g | — |
| BLD Pharmatech Co., Limited | United States | $0.55 | 100 g | 98% |
| BLD Pharmatech GmbH | Germany | $0.55 | 100 g | 98% |
| Ambeed, Inc. | United States | $0.55 | 100 g | 98% |
| AA BLOCKS | United States | $0.55 | 100 g | 97% |
| Fluorochem EU | Germany | $0.97 | 25 g | 97% |
| Fluorochem UK | United Kingdom | $0.97 | 25 g | 97% |
| AstaTech (2 weeks) | United States | $7.04 | 25 g | 95% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | — |
Chemical Identity
CAS3555-47-3
PubChem CIDNot recorded
DTXSIDDTXSID9042463
FormulaC12H36O4Si5
Mol. Weight384.841 g/mol
SMILESC[Si](C)(C)O[Si](O[Si](C)(C)C)(O[Si](C)(C)C)O[Si](C)(C)C
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
Tetrakis(trimethylsiloxy)silane (CAS 3555-47-3) https://chemicalindependence.com/chemical/3555-47-3/ EPA TSCA Inventory: CAS 3555-47-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory