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1,3-Benzenedicarboxylic acid

CAS 121-91-5

U.S. production volumes are classified as confidential business information.

Molecular structure of 121-91-5
US productionCBI
Import value, 2024$316M
Top sourceSouth Korea 19%

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 291739 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 291739, which covers 103 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
KR 19%South KoreaCN 19%ChinaIN 18%IndiaES 13%SpainCA 9%Canada
EPA-registered manufacturers (5)
Indorama Netherlands Bv · NL Netherlands
Ineos Enterprises Holdings New · GB United Kingdom
Allnex Usa
Indorama Ventures Usa Holdings
Ineos Enterprises Us Hold
Domestic parents -- activity not disclosed (3)
Alpek Polyester Usa
Eastman Chemical
Mitsubishi Gas Chemical America
EPA-registered importers (15)
Basf Se · DE Germany
Posco Holdings · KR South Korea
Toray Industries · JP Japan
Apg Polytech
Basf
Show all 15
Catalynt Solutions
Colonial Group
Henkel
Polynt Composites Usa
Posco International America
Soyventis North America
Starchem Usa
The Chemical
The Sherwin Williams
Toray Industries (America)

Why It Matters

Sectors
ConstructionMetals & MiningPlastics & RubberTextilesPaints & CoatingsCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 7 sectors as 5 functional roles.

  • •Monomers in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
  • •Intermediate in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
  • •Monomers in Paint and Coating Manufacturing (25%)Processing as a reactant
  • •Monomers in Adhesive Manufacturing (100%)Processing as a reactant
  • •Intermediate in Plastics Product ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Lubricating agent in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Lubricating agent in Machinery Manufacturing (100%)Use—non-incorporative activities
  • •Monomers in Textiles, apparel, and leather manufacturing (30%)Processing as a reactant
  • •Solvent in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
  • •Filler in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.01/gAaron Chemicals LLC
CountryHong Kong
Pack$5.00 / 500 g
PurityNot recorded
Vendors25 available

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

24 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.01500 g—
A2B Chem LLCUnited States$0.0210 kg95%
AA BLOCKSUnited States$0.0210 kg95%
ALFA AESARGermany$0.035 kg99%
BLD Pharmatech Co., LimitedUnited States$0.031 kg98%
BLD Pharmatech GmbHGermany$0.031 kg98%
BLD Pharmatech Ltd.China$0.031 kg98%
Ambeed, Inc.United States$0.031 kg98%
Sigma-Aldrich (Rush Stock)Germany$0.042 kg99%
Sigma-AldrichGermany$0.042 kg99%
ChemsceneUnited States$0.051 kg—
Fluorochem EUGermany$0.07500 g95%
Fluorochem UKUnited Kingdom$0.07500 g95%
MedChemExpress MCESweden$0.071 kg99.96%
AK Scientific SpecializedUnited States$0.10500 g98%
AK Scientific, Inc.United States$0.14500 g99%
Combi-Blocks, Inc.United States$0.251 kg95%
Angene International LimitedUnited States$0.28500 g99%
MedKoo Biosciences, IncUnited States$10.0025 g98%
InterbioscreenHong Kong$10.0010 g95%
Labotest KGGermany$217.805000 mg90%
Princeton BioMolecular Research (SC)United States$2900.00100 mg90%
Vitas M Chemical LimitedHong Kong$3170.00100 mg90%
AngeneChina → Hong Kong$4266.6730 mg—

Chemical Identity

CAS121-91-5
PubChem CID8496
DTXSIDDTXSID3021485
FormulaC8H6O4
Mol. Weight166.13 g/mol
SMILESC1=CC(=CC(=C1)C(=O)O)C(=O)O

Data Sources

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Brief citations

1,3-Benzenedicarboxylic acid (CAS 121-91-5) https://chemicalindependence.com/chemical/121-91-5/ EPA CompTox (DSSTox): DTXSID3021485. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3021485 PubChem: 8496. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8496 EPA Chemical Data Reporting: 121-91-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 121-91-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291739 for CAS 121-91-5. Reporting year: 2024. https://usatrade.census.gov/