Hexaphenylcyclotrisiloxane
CAS 512-63-0
Cyclotrisiloxane, 2,2,4,4,6,6-hexaphenyl-
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
$30.40/gAA BLOCKS
CountryUnited States
Pack$152.00 / 5 g
Purity96%
Vendors9 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
8 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 |
|---|---|---|---|---|
| Combi-Blocks, Inc. | United States | $32.00 | 5 g | 95% |
| A2B Chem LLC | United States | $32.00 | 5 g | 96% |
| Aaron Chemicals LLC | Hong Kong | $43.00 | 1 g | 95% |
| Angene Chemical | China → Hong Kong | $45.00 | 1 g | 95% |
| AstaTech (2 weeks) | United States | $57.00 | 5 g | 95% |
| BLD Pharmatech Ltd. | China | $87.60 | 5 g | 95% |
| Angene International Limited | United States | $138.20 | 5 g | 95% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 95% |
Chemical Identity
CAS512-63-0
PubChem CIDNot recorded
DTXSIDDTXSID4060151
FormulaC36H30O3Si3
Mol. Weight594.888 g/mol
SMILESO1[Si](O[Si](O[Si]1(C1=CC=CC=C1)C1=CC=CC=C1)(C1=CC=CC=C1)C1=CC=CC=C1)(C1=CC=CC=C1)C1=CC=CC=C1
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
Hexaphenylcyclotrisiloxane (CAS 512-63-0) https://chemicalindependence.com/chemical/512-63-0/ EPA TSCA Inventory: CAS 512-63-0. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory