1,3,3,5-Tetramethyl-1,1,5,5-tetraphenyltrisiloxane

No U.S. production. America imports the entire domestic supply.

Molecular structure of 3982-82-9
US ProductionZero
Import Value$537M
Import Volume42.0K lbs
Import Dependency100%
Top SourceChina 39%
1,3,3,5-Tetramethyl-1,1,5,5-tetraphenyltrisiloxane · US import value by year
$1.1B2013$470M2025

Where It Comes From

Customs basis: HS 293190 · basket

These shares come from HS customs code 293190, which covers 164 chemicals in total. They estimate the bucket's origin mix, not this chemical specifically.

Source Countries
CN 39%ChinaDE 17%GermanyIT 9%ItalyIN 7%IndiaJP 7%Japan
EPA-registered importers (1)
Shin Etsu Silicones Of America

Why It Matters

Sectors
Plastics & Rubber
Downstream UsesNo data available
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 1 sector as 1 functional role.

  • •Lubricating agent in Synthetic Rubber Manufacturing (25%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$2.76/gAK Scientific, Inc.
CountryUnited States
Pack$276.00 / 100 g
PurityNo data available
Vendors1 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

Chemical Identity

CAS3982-82-9
PubChem CID19882
DTXSIDDTXSID2052073
FormulaC28H32O2Si3
Mol. Weight484.8 g/mol
SMILESC[Si](C)(O[Si](C)(C1=CC=CC=C1)C2=CC=CC=C2)O[Si](C)(C3=CC=CC=C3)C4=CC=CC=C4

Data Sources

DTXSID20520732026-04-06

https://doi.org/10.23645/epacomptox.5588566

Archive: data/sources/comptox/dsstox_identifiers.csv

198822026-04-06

https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/19882/property/MolecularFormula,MolecularWeight,CanonicalSMILES,InChIKey/JSON

Archive: data/sources/pubchem_properties/19882.json

3982-82-92026-04-24

https://www.epa.gov/chemical-data-reporting

Archive: data/sources/epa_cdr/2020_cdr.csv

CAS 3982-82-92026-04-25

https://www.epa.gov/chemical-data-reporting

Archive: data/sources/epa_cdr/2020_cdr_industrial.csv

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