3-Mercaptopropyltrimethoxysilane
CAS 4420-74-0
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 293090 · basket
- 2023
- US production Confidential · Imports Confidential
- 2019
- US production Confidential · Imports Confidential
These shares come from HS customs code 293090, which covers 418 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Israel
- Croatia
- Ukraine
- Slovakia
- United Arab Emirates
- Ireland
- Poland
- Lithuania
- Brazil
- Singapore
- Australia
- Armenia
- Hong Kong
- Vietnam
- Czech Republic
- Hungary
- Greece
- Russia
Why It Matters
Industrial Uses
Used in 6 sectors as 2 functional roles.
- •Adhesion/cohesion promoter in Rubber Product Manufacturing (100%)Processing—incorporation into article
- •Binder in Adhesive Manufacturing (20%)Processing—incorporation into formulation, mixture, or reaction product
- •Binder in Asphalt Paving, Roofing, and Coating Materials Manufacturing (20%)Processing—incorporation into formulation, mixture, or reaction product
- •Binder in Paint and Coating Manufacturing (30%)Processing—incorporation into formulation, mixture, or reaction product
- •Binder in Rubber Product Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
- •Binder in Miscellaneous Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
- •Binder in Synthetic Rubber Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
- •Adhesion/cohesion promoter in Paint and Coating Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
14 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 | $0.04 | 500 g | 95% |
| Manchester Organics | United Kingdom | $0.07 | 500 g | 97% |
| Fluorochem UK | United Kingdom | $0.14 | 100 g | 95% |
| A2B Chem LLC | United States | $0.17 | 500 g | 95% |
| AK Scientific Specialized | United States | $0.18 | 500 g | 95% |
| AA BLOCKS | United States | $0.22 | 500 g | 95% |
| AK Scientific, Inc. | United States | $0.24 | 500 g | 98% |
| Ambeed, Inc. | United States | $0.52 | 100 g | 98% |
| Sigma-Aldrich (Rush Stock) | Germany | $1.43 | 500 g | 95% |
| Sigma-Aldrich | Germany | $1.43 | 500 g | 95% |
| AstaTech (2 weeks) | United States | $1.76 | 25 g | 95% |
| Angene International Limited | United States | $2.84 | 25 g | 98% |
| Interbioscreen | Hong Kong | $51.00 | 10 g | 95% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 95% |
Chemical Identity
Data Sources
- EPA CompTox (DSSTox) · DTXSID2044428Retrieved 2026-04-06
- PubChem · compound 20473Retrieved 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
3-Mercaptopropyltrimethoxysilane (CAS 4420-74-0) https://chemicalindependence.com/chemical/4420-74-0/ EPA CompTox (DSSTox): DTXSID2044428. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2044428 PubChem: 20473. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/20473 EPA Chemical Data Reporting: 4420-74-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 4420-74-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293090 for CAS 4420-74-0. Reporting year: 2024. https://usatrade.census.gov/