Dimethoxy(methyl)phenylsilane

CAS 3027-21-2

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 2019 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: 2019.

Where It Comes From

EPA reports by year

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

Plastics & RubberPaints & Coatings

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

Used in 2 sectors as 2 functional roles.

•Heat stabilizer in Synthetic Rubber Manufacturing (30%)Processing as a reactant
•Heat stabilizer in Paint and Coating Manufacturing (70%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in Paint and Coating Manufacturing (70%)Processing—repackaging

Vendor Pricing

$0.10/gAaron Chemicals LLC

CountryHong Kong

Pack$51.00 / 500 g

PurityNot recorded

Vendors15 available

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

14 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.11	1 kg	98%
Angene Chemical	China → Hong Kong	$0.11	500 g	—
BLD Pharmatech Co., Limited	United States	$0.15	1 kg	98%
BLD Pharmatech GmbH	Germany	$0.15	1 kg	98%
BLD Pharmatech Ltd.	China	$0.15	1 kg	98%
Ambeed, Inc.	United States	$0.15	1 kg	98%
AA BLOCKS	United States	$0.23	100 g	98%
Combi-Blocks, Inc.	United States	$0.25	1 kg	98%
Fluorochem EU	Germany	$0.35	100 g	95%
Fluorochem UK	United Kingdom	$0.36	100 g	95%
Apollo Scientific UK	United Kingdom	$0.67	100 g	98%
Key Organics Ltd.	United Kingdom	$1.05	100 g	95%
AstaTech (2 weeks)	United States	$1.65	100 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	—

Chemical Identity

CAS3027-21-2

PubChem CID18193

DTXSIDDTXSID4044909

FormulaC9H14O2Si

Mol. Weight182.29 g/mol

SMILESCO[Si](C)(C1=CC=CC=C1)OC

Data Sources

EPA CompTox (DSSTox) · DTXSID4044909Retrieved 2026-04-06
PubChem · compound 18193Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04

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Brief citations

Dimethoxy(methyl)phenylsilane (CAS 3027-21-2) https://chemicalindependence.com/chemical/3027-21-2/ EPA CompTox (DSSTox): DTXSID4044909. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4044909 PubChem: 18193. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/18193 EPA Chemical Data Reporting: 3027-21-2. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3027-21-2. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting