Octamethyltrisiloxane
Drug ingredientCAS 107-51-7
This drug ingredient has classified U.S. production volumes. EPA withholds the number 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 Confidential · Imports Confidential
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
Appears in 1 drug and cosmetic product listings (FDA).
- •Barrier Repair Cream
Industrial Uses
Used in 3 sectors as 3 functional roles.
- •Diluent in Electrical Equipment, Appliance, and Component Manufacturing (100%)Processing as a reactant
- •Diluent in All Other Chemical Product and Preparation Manufacturing (100%)Processing—repackaging
- •Intermediate in All Other Basic Inorganic Chemical Manufacturing (20%)Processing as a reactant
- •Heat transferring agent in All Other Chemical Product and Preparation Manufacturing (20%)Processing—repackaging
Vendor Pricing
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 |
|---|---|---|---|---|
| Angene Chemical | China → Hong Kong | $0.34 | 500 g | — |
| Fluorochem UK | United Kingdom | $0.60 | 100 g | — |
| AK Scientific, Inc. | United States | $0.87 | 100 g | 98% |
| A2B Chem LLC | United States | $1.20 | 100 g | 98% |
| Combi-Blocks, Inc. | United States | $1.20 | 100 g | 98% |
| AA BLOCKS | United States | $1.32 | 25 g | 98% |
| Angene International Limited | United States | $3.20 | 25 g | 98% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | — |
Chemical Identity
Data Sources
- EPA CompTox (DSSTox) · DTXSID9040710Retrieved 2026-04-06
- PubChem · compound 24705Retrieved 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
Octamethyltrisiloxane (CAS 107-51-7) https://chemicalindependence.com/chemical/107-51-7/ EPA CompTox (DSSTox): DTXSID9040710. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9040710 PubChem: 24705. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/24705 EPA Chemical Data Reporting: 107-51-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 107-51-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293190 for CAS 107-51-7. Reporting year: 2024. https://usatrade.census.gov/