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4-Sulfophthalic acid

CAS 89-08-7

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

Molecular structure of 89-08-7
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 433.5K lb · Imports Zero

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 (1)
Pilot Chemical Holdings

Why It Matters

Sectors
Metals & MiningCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 2 sectors as 2 functional roles.

  • •Plating agent in Fabricated Metal Product ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Corrosion inhibitor in All Other Basic Organic Chemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS89-08-7
PubChem CID6962
DTXSIDDTXSID6026535
FormulaC8H6O7S
Mol. Weight246.2 g/mol
SMILESC1=CC(=C(C=C1S(=O)(=O)O)C(=O)O)C(=O)O

Data Sources

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Brief citations

4-Sulfophthalic acid (CAS 89-08-7) https://chemicalindependence.com/chemical/89-08-7/ EPA CompTox (DSSTox): DTXSID6026535. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6026535 PubChem: 6962. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6962 EPA Chemical Data Reporting: 89-08-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 89-08-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291739 for CAS 89-08-7. Reporting year: 2024. https://usatrade.census.gov/