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Octaethyl trisilicate

CAS 4521-94-2

Trisiloxane, 1,1,1,3,3,5,5,5-octaethoxy-

EPA and Census publish no US supply data for this chemical.

Molecular structure of 4521-94-2
US productionNot reported
Top sourceNo public record

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Where It Comes From

EPA and Census publish no US supply data for this chemical.

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS4521-94-2
PubChem CIDNot recorded
DTXSIDDTXSID7063508
FormulaC16H40O10Si3
Mol. Weight476.741 g/mol
SMILESCCO[Si](OCC)(OCC)O[Si](OCC)(OCC)O[Si](OCC)(OCC)OCC

Data Sources

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Brief citations

Octaethyl trisilicate (CAS 4521-94-2) https://chemicalindependence.com/chemical/4521-94-2/ EPA TSCA Inventory: CAS 4521-94-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory