4,4,15,15-Tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane
CAS 40372-72-3
EPA’s 2023 records show zero U.S. production of this chemical.
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. 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 Zero · 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 3 sectors as 2 functional roles.
- •Adhesion/cohesion promoter in Synthetic Rubber ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
- •Adhesion/cohesion promoter in Rubber Product ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
- •Binder in Rubber Product Manufacturing (94%)Processing—incorporation into article
- •Binder in Other (6%)Processing—incorporation into article
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
13 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 |
|---|---|---|---|---|
| Aaron Chemicals LLC | Hong Kong | $0.12 | 500 g | — |
| Chemscene | United States | $0.12 | 1 kg | — |
| Angene Chemical | China → Hong Kong | $0.12 | 500 g | 98% |
| AA BLOCKS | United States | $0.13 | 2.5 kg | 95% |
| Fluorochem UK | United Kingdom | $0.15 | 1 kg | 90% |
| MedChemExpress MCE | Sweden | $0.15 | 1 kg | — |
| Combi-Blocks, Inc. | United States | $0.25 | 1 kg | 95% |
| Fluorochem EU | Germany | $0.29 | 100 g | 90% |
| AstaTech, Inc | United States | $0.30 | 500 g | 90% |
| Angene International Limited | United States | $0.60 | 500 g | 22.3% |
| AK Scientific Specialized | United States | $0.61 | 100 g | 22.3% |
| AK Scientific, Inc. | United States | $0.84 | 100 g | 95% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 98% |
Chemical Identity
Data Sources
- EPA CompTox (DSSTox) · DTXSID3029362Retrieved 2026-04-06
- PubChem · compound 162012Retrieved 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
4,4,15,15-Tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane (CAS 40372-72-3) https://chemicalindependence.com/chemical/40372-72-3/ EPA CompTox (DSSTox): DTXSID3029362. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3029362 PubChem: 162012. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/162012 EPA Chemical Data Reporting: 40372-72-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 40372-72-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293090 for CAS 40372-72-3. Reporting year: 2024. https://usatrade.census.gov/