Dimethoxy(diphenyl)silane
CAS 6843-66-9
U.S. production volumes are classified as confidential business information.
At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.
Why supply is unknownProduction is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.
Where It Comes From
Customs basis: HS 293190 · basket
- 2023
- US production Confidential · Imports Confidential
- 2019
- US production 182.6K lb · Imports Zero
These shares come from HS customs code 293190, which covers 378 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Ireland
- Netherlands
- Switzerland
- Monaco
- Ukraine
- Spain
- Mexico
- Poland
- Indonesia
- Armenia
- Israel
- Sweden
- Australia
- Czech Republic
- Hungary
- Brunei
- Hong Kong
- Brazil
- Thailand
- Argentina
- Finland
- Austria
- Latvia
Why It Matters
Industrial Uses
Used in 2 sectors as 2 functional roles.
- •Intermediate in Adhesive Manufacturing (100%)Processing as a reactant
- •Adhesion/cohesion promoter in Synthetic Rubber Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
16 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 |
|---|---|---|---|---|
| Angene Chemical | China → Hong Kong | $0.05 | 500 g | 98% |
| A2B Chem LLC | United States | $0.06 | 500 g | 97% |
| AA BLOCKS | United States | $0.07 | 500 g | 98% |
| Chemscene | United States | $0.09 | 1 kg | — |
| BLD Pharmatech Co., Limited | United States | $0.09 | 1 kg | 98% |
| BLD Pharmatech GmbH | Germany | $0.09 | 1 kg | 98% |
| BLD Pharmatech Ltd. | China | $0.09 | 1 kg | 98% |
| Ambeed, Inc. | United States | $0.09 | 1 kg | 98% |
| Fluorochem UK | United Kingdom | $0.09 | 500 g | 95% |
| Fluorochem EU | Germany | $0.12 | 100 g | 95% |
| AK Scientific Specialized | United States | $0.14 | 500 g | 95% |
| AK Scientific, Inc. | United States | $0.18 | 500 g | 98% |
| Combi-Blocks, Inc. | United States | $0.25 | 1 kg | 98% |
| Angene International Limited | United States | $0.28 | 500 g | 95% |
| AstaTech (2 weeks) | United States | $0.99 | 100 g | 97% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 98% |
Chemical Identity
Data Sources
- EPA CompTox (DSSTox) · DTXSID2044717Retrieved 2026-04-06
- PubChem · compound 81284Retrieved 2026-04-06
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
Dimethoxy(diphenyl)silane (CAS 6843-66-9) https://chemicalindependence.com/chemical/6843-66-9/ EPA CompTox (DSSTox): DTXSID2044717. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2044717 PubChem: 81284. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/81284 EPA Chemical Data Reporting: 6843-66-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 6843-66-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293190 for CAS 6843-66-9. Reporting year: 2024. https://usatrade.census.gov/