Flag of the United StatesAmerican Chemical Independence

Decamethylcyclopentasiloxane

Drug ingredient

CAS 541-02-6

This drug ingredient has classified U.S. production volumes. EPA withholds the number as confidential business information.

Molecular structure of 541-02-6
US productionCBI
Import value, 2024$537M
Top sourceChina 39%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 293190 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 293190, which covers 378 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 39%ChinaDE 17%GermanyIT 9%ItalyIN 7%IndiaJP 7%Japan
EPA-registered manufacturers (2)
Ab Specialty Silicones
Dow Chemical
Domestic parents -- activity not disclosed (4)
Aceto Us
Chemical Distribution Network
Elkem Silicones Usa
Wacker Chemical Corporation - Headquarters
EPA-registered importers (9)
Kcc · KR South Korea
Toray Industries · JP Japan
Brb North America
Cht Usa
Elementis
Show all 9
Fci
Mom Holding
Shin Etsu Silicones Of America
Toray Composite Materials America

Why It Matters

Sectors
HealthConstructionMetals & MiningPlastics & RubberConsumer ProductsPaints & CoatingsCore Chemicals
Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

  • •Sensitive Pocket SUN
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 11 sectors as 9 functional roles.

  • •Intermediate in All Other Basic Inorganic Chemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Cleaning agent in Soap, Cleaning Compound, and Toilet Preparation ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Terminator/Blocker in Synthetic Rubber ManufacturingProcessing as a reactant
  • •Surface modifier in Miscellaneous Manufacturing (100%)Processing as a reactant
  • •Solvent in Soap, Cleaning Compound, and Toilet Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Solvent in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Solvent in All Other Basic Inorganic Chemical Manufacturing (1%)Processing—incorporation into formulation, mixture, or reaction product
  • •Solvent in Other (90%)Processing—repackaging
  • •Lubricating agent in Other (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Monomers in Not Known or Reasonably AscertainableProcessing—incorporation into formulation, mixture, or reaction product
  • •Viscosity modifiers in Adhesive Manufacturing (70%)Processing—incorporation into formulation, mixture, or reaction product
  • •Viscosity modifiers in Paint and Coating Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
  • •Diluent in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Viscosity modifiers in All Other Chemical Product and Preparation Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
  • •Monomers in Plastics Product Manufacturing (100%)Processing as a reactant
  • •Intermediate in Synthetic Rubber Manufacturing (5%)Processing as a reactant

Vendor Pricing

$0.02/gAaron Chemicals LLC
CountryHong Kong
Pack$11.00 / 500 g
Purity99%
Vendors19 available

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

18 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.03500 g99%
BLD Pharmatech GmbHGermany$0.041 kg99%
BLD Pharmatech Ltd.China$0.041 kg99%
Fluorochem EUGermany$0.07500 g98%
A2B Chem LLCUnited States$0.09500 g98%
AA BLOCKSUnited States$0.11500 g99%
Ambeed, Inc.United States$0.111 kg99%
MedChemExpress MCESweden$0.13500 g99.98%
BLD Pharmatech Co., LimitedUnited States$0.13500 g99%
Angene International LimitedUnited States$0.14500 g98%
Fluorochem UKUnited Kingdom$0.22250 g99%
Combi-Blocks, Inc.United States$0.251 kg98%
AK Scientific, Inc.United States$0.55100 g99%
AstaTech (2 weeks)United States$1.4825 g95%
Labotest KGGermany$217.805000 mg90%
Sigma-Aldrich (Rush Stock)Germany$316.66500 mg—
Sigma-AldrichGermany$316.66500 mg—
AngeneChina → Hong Kong$4266.6730 mg99%

Chemical Identity

CAS541-02-6
PubChem CID10913
DTXSIDDTXSID1027184
FormulaC10H30O5Si5
Mol. Weight370.77 g/mol
SMILESC[Si]1(O[Si](O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)(C)C)C

Data Sources

← Back to Dashboard← Back to Health

Brief citations

Decamethylcyclopentasiloxane (CAS 541-02-6) https://chemicalindependence.com/chemical/541-02-6/ EPA CompTox (DSSTox): DTXSID1027184. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID1027184 PubChem: 10913. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/10913 EPA Chemical Data Reporting: 541-02-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 541-02-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293190 for CAS 541-02-6. Reporting year: 2024. https://usatrade.census.gov/