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Dodeca(phenylsilasesquioxane)

CAS 18923-59-6

Heptacyclo[11.11.1.13,9.15,21.17,19.111,17.115,23]dodecasiloxane, 1,3,5,7,9,11,13,15,17,19,21,23-dodecaphenyl-

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

Molecular structure of 18923-59-6
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

CAS18923-59-6
PubChem CIDNot recorded
DTXSIDDTXSID60893394
FormulaC72H60O18Si12
Mol. Weight1550.274 g/mol
SMILESO1[Si]2(O[Si]3(O[Si]4(O[Si]1(O[Si]1(O[Si](O2)(O[Si]2(O[Si]5(O[Si](O[Si](O2)(O3)C2=CC=CC=C2)(O[Si](O[Si](O5)(O1)C1=CC=CC=C1)(O4)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1)C1=CC=CC=C1

Data Sources

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Brief citations

Dodeca(phenylsilasesquioxane) (CAS 18923-59-6) https://chemicalindependence.com/chemical/18923-59-6/ EPA TSCA Inventory: CAS 18923-59-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory