1,1,1,3,5,5,5-Heptamethyltrisiloxane

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

Molecular structure of 1873-88-7
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 (3)
Evonik
Momentive Performance Materials
The Dow Chemical
EPA-registered importers (2)
Evonik
Pht International

Why It Matters

Sectors
AgricultureCore Chemicals
Downstream UsesNo data available
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 4 sectors as 2 functional roles.

  • Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant
  • Surfactant (surface active agent) in Agriculture, Forestry, Fishing and Hunting (10%)Processing as a reactant
  • Intermediate in All Other Chemical Product and Preparation Manufacturing (75%)Processing—repackaging
  • Intermediate in All Other Basic Inorganic Chemical Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS1873-88-7
PubChem CID6327366
DTXSIDDTXSID1038795
FormulaC7H21O2Si3
Mol. Weight221.5 g/mol
SMILESC[Si](O[Si](C)(C)C)O[Si](C)(C)C

Data Sources

DTXSID10387952026-04-06

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

Archive: data/sources/comptox/dsstox_identifiers.csv

63273662026-04-06

https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/6327366/property/MolecularFormula,MolecularWeight,CanonicalSMILES,InChIKey/JSON

Archive: data/sources/pubchem_properties/6327366.json

1873-88-72026-04-24

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

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

CAS 1873-88-72026-04-25

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

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