Tetrapropyl orthosilicate

CAS 682-01-9

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 value, 2024$208M

Top sourceChina 28%

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 292090 · basket

EPA reports by year

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

These shares come from HS customs code 292090, which covers 98 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

CN 28%ChinaKR 17%South KoreaIT 13%ItalyIN 10%IndiaDE 9%Germany

Poland
Switzerland
Ireland
Canada
Lithuania
Netherlands
Brazil
Malaysia
Hungary
Czech Republic
Saudi Arabia
Slovakia
Ukraine
Turkey

EPA-registered manufacturers (2)

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

Kcc · KR South Korea

Mom Holding

Why It Matters

Sectors

Paints & 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

•Adhesion/cohesion promoter in Paint and Coating Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.08/gAaron Chemicals LLC

CountryHong Kong

Pack$38.00 / 500 g

PurityNot recorded

Vendors14 available

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

13 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.08	1 kg	98%
Angene Chemical	China → Hong Kong	$0.08	500 g	—
AA BLOCKS	United States	$0.09	1 kg	98%
Chemscene	United States	$0.11	1 kg	—
BLD Pharmatech GmbH	Germany	$0.11	1 kg	98%
BLD Pharmatech Ltd.	China	$0.11	1 kg	98%
BLD Pharmatech Co., Limited	United States	$0.13	500 g	98%
Ambeed, Inc.	United States	$0.13	500 g	98%
Combi-Blocks, Inc.	United States	$0.25	1 kg	98%
Sigma-Aldrich (Rush Stock)	Germany	$1.89	100 g	95%
Sigma-Aldrich	Germany	$1.89	100 g	95%
Angene International Limited	United States	$3.76	25 g	97%
Angene	China → Hong Kong	$4266.67	30 mg	—

Chemical Identity

CAS682-01-9

PubChem CID69627

DTXSIDDTXSID9042382

FormulaC12H28O4Si

Mol. Weight264.43 g/mol

SMILESCCCO[Si](OCCC)(OCCC)OCCC

Data Sources

EPA CompTox (DSSTox) · DTXSID9042382Retrieved 2026-04-06
PubChem · compound 69627Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Tetrapropyl orthosilicate (CAS 682-01-9) https://chemicalindependence.com/chemical/682-01-9/ EPA CompTox (DSSTox): DTXSID9042382. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9042382 PubChem: 69627. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/69627 EPA Chemical Data Reporting: 682-01-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 682-01-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292090 for CAS 682-01-9. Reporting year: 2024. https://usatrade.census.gov/