Tetraethyl orthosilicate

CAS 78-10-4

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 (6)

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

Merck Kgaa · DE Germany

Dow Chemical

Emd Holding

Evonik

Show all 6

Mom Holding

Domestic parents -- activity not disclosed (2)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Ab Specialty Silicones

Wacker Chemical Corporation - Headquarters

EPA-registered importers (6)

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

Mitsubishi Chemical Group · JP Japan

Bakelite Us Hold

Brb North America

Mitsubishi Chemical America

Show all 6

The Sherwin Williams

Why It Matters

Sectors

ConstructionMetals & MiningPlastics & RubberPaints & CoatingsCore 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

Used in 12 sectors as 9 functional roles.

•Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant
•Filler in Paint and Coating Manufacturing (25%)Processing—incorporation into article
•Sealant (barrier) in Construction (15%)Processing—incorporation into article
•Adhesion/cohesion promoter in Synthetic Rubber Manufacturing (60%)Processing—incorporation into article
•Intermediate in All Other Chemical Product and Preparation Manufacturing (20%)Processing as a reactant
•Solvent in Primary Metal Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Binder in Paint and Coating Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Film former in All Other Chemical Product and Preparation ManufacturingProcessing as a reactant
•Insulators in Miscellaneous ManufacturingProcessing as a reactant
•Solvent in Fabricated Metal Product Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in All Other Basic Inorganic Chemical Manufacturing (100%)Processing—repackaging
•Binder in Adhesive Manufacturing (20%)Processing—incorporation into formulation, mixture, or reaction product
•Binder in Synthetic Rubber Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Binder in Miscellaneous Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Binder in Asphalt Paving, Roofing, and Coating Materials Manufacturing (20%)Processing—incorporation into formulation, mixture, or reaction product
•Binder in Rubber Product Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Adhesion/cohesion promoter in Paint and Coating Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Semiconductor and photovoltaic agent in All Other Chemical Product and Preparation ManufacturingUse—non-incorporative activities

Vendor Pricing

$0.13/gFluorochem UK

CountryUnited Kingdom

Pack$31.46 / 250 g

Purity98%

Vendors7 available

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

6 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$0.20	500 g	98%
AA BLOCKS	United States	$0.23	500 g	98%
Combi-Blocks, Inc.	United States	$0.25	1 kg	98%
Fluorochem EU	Germany	$0.82	25 g	98%
Otava, Ltd.	Ukraine	$2280.00	50 mg	95%
Otava, Ltd. (2 weeks)	Ukraine	$2724.00	50 mg	95%

Chemical Identity

CAS78-10-4

PubChem CID6517

DTXSIDDTXSID6026450

FormulaC8H20O4Si

Mol. Weight208.33 g/mol

SMILESCCO[Si](OCC)(OCC)OCC

Data Sources

EPA CompTox (DSSTox) · DTXSID6026450Retrieved 2026-04-06
PubChem · compound 6517Retrieved 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

Tetraethyl orthosilicate (CAS 78-10-4) https://chemicalindependence.com/chemical/78-10-4/ EPA CompTox (DSSTox): DTXSID6026450. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6026450 PubChem: 6517. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6517 EPA Chemical Data Reporting: 78-10-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 78-10-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292090 for CAS 78-10-4. Reporting year: 2024. https://usatrade.census.gov/