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3,3'-Dichlorobenzidine dihydrochloride

CAS 612-83-9

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

Molecular structure of 612-83-9
2 HCl
US productionCBI
Import value, 2024$84M
Top sourceJapan 31%

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 292159 · basket

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

These shares come from HS customs code 292159, which covers 51 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
JP 31%JapanIN 26%IndiaCN 21%ChinaCH 13%SwitzerlandBE 4%Belgium

Why It Matters

Sectors
TextilesPaper & Printing
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 2 sectors as 1 functional role.

  • •Pigment in Printing Ink ManufacturingProcessing as a reactant
  • •Pigment in Synthetic Dye and Pigment Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS612-83-9
PubChem CID11933
DTXSIDDTXSID1020433
FormulaC12H12Cl4N2
Mol. Weight326 g/mol
SMILESC1=CC(=C(C=C1C2=CC(=C(C=C2)N)Cl)Cl)N.Cl.Cl

Data Sources

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Brief citations

3,3'-Dichlorobenzidine dihydrochloride (CAS 612-83-9) https://chemicalindependence.com/chemical/612-83-9/ EPA CompTox (DSSTox): DTXSID1020433. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID1020433 PubChem: 11933. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/11933 EPA Chemical Data Reporting: 612-83-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 612-83-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292159 for CAS 612-83-9. Reporting year: 2024. https://usatrade.census.gov/