1,2,3-Trimethylbenzene

CAS 526-73-8

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$68M

Top sourceIndia 35%

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 290290 · basket

EPA reports by year

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

These shares come from HS customs code 290290, which covers 171 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).

IN 35%IndiaTW 11%TaiwanES 10%SpainDE 10%GermanyCN 8%China

Czech Republic
Netherlands
Switzerland
Pakistan
United Kingdom
Austria
Denmark
Indonesia
Lithuania
Hong Kong
Finland

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.

Crh Americas

Trafigura Trading

EPA-registered importers (1)

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

Nippon Paint Automotive Americas

Why It Matters

Sectors

EnergyConstructionPaints & 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.

•Solvent in Paint and Coating Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Fuel agents in Petroleum Refineries (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$1.38/gCombi-Blocks, Inc.

CountryUnited States

Pack$690.00 / 500 g

Purity97%

Vendors8 available

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

7 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$1.47	500 g	85%
AA BLOCKS	United States	$1.55	500 g	85%
Apollo Scientific UK	United Kingdom	$3.06	100 g	95%
Fluorochem UK	United Kingdom	$6.46	25 g	90%
Labotest KG	Germany	$217.80	5000 mg	90%
Sigma-Aldrich (Rush Stock)	Germany	$226.96	250 mg	—
Sigma-Aldrich	Germany	$226.96	250 mg	—

Chemical Identity

CAS526-73-8

PubChem CID10686

DTXSIDDTXSID8047769

FormulaC9H12

Mol. Weight120.19 g/mol

SMILESCC1=C(C(=CC=C1)C)C

Data Sources

EPA CompTox (DSSTox) · DTXSID8047769Retrieved 2026-04-06
PubChem · compound 10686Retrieved 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

1,2,3-Trimethylbenzene (CAS 526-73-8) https://chemicalindependence.com/chemical/526-73-8/ EPA CompTox (DSSTox): DTXSID8047769. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8047769 PubChem: 10686. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/10686 EPA Chemical Data Reporting: 526-73-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 526-73-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290290 for CAS 526-73-8. Reporting year: 2024. https://usatrade.census.gov/