1,1,1,3,5,5,5-Heptamethyl-3-octyltrisiloxane

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

Molecular structure of 17955-88-3
US ProductionCBI
Import Value$537M
Import VolumeZero
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 (1)
The Dow Chemical

Why It Matters

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

Industrial Uses

Used in 1 sector as 1 functional role.

  • Solvent in Other (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.94/gA2B Chem LLC
CountryUnited States
Pack$471.00 / 500 g
Purity97%
Vendors11 available

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

10 more vendors
VendorCountry$/gPackPurity
AA BLOCKSUnited States$0.96500 g97%
Combi-Blocks, Inc.United States$2.46500 g95%
Aaron Chemicals LLCHong Kong$2.60500 g97%
BLD Pharmatech Ltd.China$2.63500 g97%
Angene ChemicalChina Hong Kong$2.98500 g97%
AK Scientific, Inc.United States$3.5625 g95%
BLD Pharmatech Co., LimitedUnited States$5.77100 g97%
Ambeed, Inc.United States$5.77100 g97%
Angene International LimitedUnited States$6.8825 g95%
BLD Pharmatech GmbHGermany$7.0025 g97%

Chemical Identity

CAS17955-88-3
PubChem CID87373
DTXSIDDTXSID6051807
FormulaC15H38O2Si3
Mol. Weight334.72 g/mol
SMILESCCCCCCCC[Si](C)(O[Si](C)(C)C)O[Si](C)(C)C

Data Sources

DTXSID60518072026-04-06

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

Archive: data/sources/comptox/dsstox_identifiers.csv

873732026-04-06

https://pubchem.ncbi.nlm.nih.gov/rest/pug/compound/cid/87373/property/MolecularFormula,MolecularWeight,CanonicalSMILES,InChIKey/JSON

Archive: data/sources/pubchem_properties/87373.json

17955-88-32026-04-24

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

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

CAS 17955-88-32026-04-25

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

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