1,1,3,3-Tetramethyldisiloxane

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

Molecular structure of 3277-26-7
US ProductionCBI
Import Value$537M
Top SourceChina 39%

The EPA did not publish how much of this chemical companies made or imported, or marked that amount confidential. Without that volume, ACID cannot calculate import dependency.

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 manufacturers (2)
Momentive Performance Materials
The Dow Chemical
EPA-registered importers (1)
Milliken &

Why It Matters

Sectors
Metals & MiningCore Chemicals
Downstream UsesNo data available
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 4 sectors as 2 functional roles.

  • Viscosity modifiers in All Other Chemical Product and Preparation Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
  • Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant
  • Intermediate in All Other Chemical Product and Preparation Manufacturing (10%)Processing—repackaging
  • Intermediate in Other (100%)Processing as a reactant
  • Intermediate in All Other Basic Inorganic Chemical Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS3277-26-7
PubChem CID6327482
DTXSIDDTXSID3052010
FormulaC4H12OSi2
Mol. Weight132.31 g/mol
SMILESC[Si](C)O[Si](C)C

Data Sources

DTXSID30520102026-04-06

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

Archive: data/sources/comptox/dsstox_identifiers.csv

63274822026-04-06

https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/6327482/property/MolecularFormula,MolecularWeight,CanonicalSMILES,InChIKey/JSON

Archive: data/sources/pubchem_properties/6327482.json

3277-26-72026-04-24

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

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

CAS 3277-26-72026-04-25

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

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