4-Methyltetrahydrophthalic anhydride

CAS 34090-76-1

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$37M

Top sourceChina 25%

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 291720 · basket

EPA reports by year

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

These shares come from HS customs code 291720, which covers 42 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 25%ChinaIT 21%ItalyJP 21%JapanDE 14%GermanyIN 9%India

Ukraine
South Africa
Malaysia
Netherlands
Mexico
United Kingdom
Switzerland
Latvia
Canada

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.

Dixie Chemical

Lindau Chemicals

Why It Matters

Sectors

Plastics & RubberCore 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 2 sectors as 4 functional roles.

•Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•pH regulating agent in Plastics Material and Resin Manufacturing (5%)Processing—incorporation into formulation, mixture, or reaction product
•Hardener in Plastics Material and Resin Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
•Chelating agent in Plastics Material and Resin Manufacturing (5%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS34090-76-1

PubChem CIDNot recorded

DTXSIDDTXSID9029356

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA CompTox (DSSTox) · DTXSID9029356Retrieved 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

4-Methyltetrahydrophthalic anhydride (CAS 34090-76-1) https://chemicalindependence.com/chemical/34090-76-1/ EPA CompTox (DSSTox): DTXSID9029356. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9029356 EPA Chemical Data Reporting: 34090-76-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 34090-76-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291720 for CAS 34090-76-1. Reporting year: 2024. https://usatrade.census.gov/