Cyclotrisiloxane, 2,4,6-triethenyl-2,4,6-trimethyl-

CAS 3901-77-7

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

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import volumeZero

Top sourceNo public record

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.

Where It Comes From

EPA reports by year

2023: US production Confidential · Imports Zero
2019: US production Confidential · Imports Zero

EPA-registered manufacturers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Dow Chemical

Why It Matters

Sectors

Core Chemicals

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

•Intermediate in All Other Basic Inorganic Chemical Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.31/gAaron Chemicals LLC

CountryHong Kong

Pack$154.00 / 500 g

Purity95%

Vendors14 available

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

13 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.31	500 g	95%
A2B Chem LLC	United States	$0.51	1 kg	97%
AA BLOCKS	United States	$0.54	1 kg	97%
Combi-Blocks, Inc.	United States	$1.16	500 g	95%
Chemscene	United States	$1.76	100 g	—
Angene International Limited	United States	$1.88	250 g	96%
Fluorochem UK	United Kingdom	$2.55	100 g	95%
Fluorochem EU	Germany	$2.59	100 g	95%
Ambeed, Inc.	United States	$3.56	25 g	97%
Synthonix	United States	$4.40	25 g	97%
AK Scientific Specialized	United States	$6.00	25 g	95%
AK Scientific, Inc.	United States	$8.24	25 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	95%

Chemical Identity

CAS3901-77-7

PubChem CID77507

DTXSIDDTXSID1063229

FormulaC9H18O3Si3

Mol. Weight258.49 g/mol

SMILESC[Si]1(O[Si](O[Si](O1)(C)C=C)(C)C=C)C=C

Data Sources

EPA CompTox (DSSTox) · DTXSID1063229Retrieved 2026-04-06
PubChem · compound 77507Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

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Brief citations

Cyclotrisiloxane, 2,4,6-triethenyl-2,4,6-trimethyl- (CAS 3901-77-7) https://chemicalindependence.com/chemical/3901-77-7/ EPA CompTox (DSSTox): DTXSID1063229. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID1063229 PubChem: 77507. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/77507 EPA Chemical Data Reporting: 3901-77-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3901-77-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting