Silicic acid, diethoxyoctylsilyl trimethylsilyl ester

CAS 216689-57-5

U.S. production volumes are classified as confidential business information.

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import volumeZero

Top sourceNo public record

At least one company claimed its 2019 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2019.

Where It Comes From

EPA reports by year

2019: US production Confidential · Imports Zero

EPA-registered manufacturers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Dow Chemical

Why It Matters

Sectors

ConstructionCore Chemicals

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 2 sectors as 1 functional role.

•Impregnation agent in All Other Basic Inorganic Chemical Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
•Impregnation agent in Construction (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS216689-57-5

PubChem CID138394933

DTXSIDDTXSID10889126

FormulaC15H36O5Si3

Mol. Weight380.7 g/mol

SMILESCCCCCCCC[Si](OCC)(OCC)O[Si](=O)O[Si](C)(C)C

Data Sources

EPA CompTox (DSSTox) · DTXSID10889126Retrieved 2026-04-06
PubChem · compound 138394933Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04

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Brief citations

Silicic acid, diethoxyoctylsilyl trimethylsilyl ester (CAS 216689-57-5) https://chemicalindependence.com/chemical/216689-57-5/ EPA CompTox (DSSTox): DTXSID10889126. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID10889126 PubChem: 138394933. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/138394933 EPA Chemical Data Reporting: 216689-57-5. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 216689-57-5. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting