Benzenesulfonic acid, 4,5-dichloro-2-[2-[4,5-dihydro-3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-yl]diazenyl]-, calcium salt (1:1)

CAS 65212-77-3

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

Molecular structure of 65212-77-3 — 1 Ca²⁺

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceNo public record

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.

Where It Comes From

EPA reports by year

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

Domestic parents -- activity not disclosed (3)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Basf

Hct

Pigments Services

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.

Trust Chem Usa Llc.

Why It Matters

Sectors

Plastics & RubberPaints & CoatingsPaper & Printing

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 3 sectors as 2 functional roles.

•Pigment in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Dye in Printing and Related Support Activities (100%)Use—non-incorporative activities
•Pigment in Paint and Coating Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS65212-77-3

PubChem CID174091

DTXSIDDTXSID10886751

FormulaC16H10CaCl2N4O7S2

Mol. Weight545.4 g/mol

SMILESCC1=NN(C(=O)C1N=NC2=CC(=C(C=C2S(=O)(=O)[O-])Cl)Cl)C3=CC(=CC=C3)S(=O)(=O)[O-].[Ca+2]

Data Sources

EPA CompTox (DSSTox) · DTXSID10886751Retrieved 2026-04-06
PubChem · compound 174091Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

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Brief citations

Benzenesulfonic acid, 4,5-dichloro-2-[2-[4,5-dihydro-3-methyl-5-oxo-1-(3-sulfophenyl)-1H-pyrazol-4-yl]diazenyl]-, calcium salt (1:1) (CAS 65212-77-3) https://chemicalindependence.com/chemical/65212-77-3/ EPA CompTox (DSSTox): DTXSID10886751. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID10886751 PubChem: 174091. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/174091 EPA Chemical Data Reporting: 65212-77-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 65212-77-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting