Disiloxane, 1,3-dimethyl-1,1,3,3-tetraphenyl-
CAS 807-28-3
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
$10.12/gA2B Chem LLC (2 weeks)
CountryUnited States
Pack$253.00 / 25 g
Purity97%
Vendors4 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
3 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 |
|---|---|---|---|---|
| AA BLOCKS (2 weeks) | United States | $10.52 | 25 g | 97% |
| Aaron Chemicals LLC | Hong Kong | $11.88 | 25 g | — |
| Combi-Blocks, Inc. | United States | $90.00 | 5 g | 97% |
Chemical Identity
CAS807-28-3
PubChem CIDNot recorded
DTXSIDDTXSID7061144
FormulaC26H26OSi2
Mol. Weight410.663 g/mol
SMILESC[Si](O[Si](C)(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
Disiloxane, 1,3-dimethyl-1,1,3,3-tetraphenyl- (CAS 807-28-3) https://chemicalindependence.com/chemical/807-28-3/ EPA TSCA Inventory: CAS 807-28-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory