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Benzenesulfonic acid, 2,2′-[(9,10-dihydro-9,10-dioxo-1,4-anthracenediyl)diimino]bis[5-methyl-, sodium salt (1:2)

CAS 4403-90-1

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

Molecular structure of 4403-90-1
2 Na⁺
US productionCBI
Import value, 2024$56M
Top sourceIndia 70%

At least one company claimed its 2019 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: 2019. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 320412 · basket

EPA reports by year
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 320412, which covers 106 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 70%IndiaMY 7%MalaysiaCH 4%SwitzerlandCN 4%ChinaDE 3%Germany
Domestic parents -- activity not disclosed (1)
Milliken &

Why It Matters

Sectors
Core Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

  • •Dyes in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.14/gAaron Chemicals LLC
CountryHong Kong
Pack$71.00 / 500 g
Purity95%
Vendors13 available

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

12 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.15500 g95%
A2B Chem LLCUnited States$0.18500 g—
AA BLOCKSUnited States$0.22500 g—
AK Scientific, Inc.United States$0.79100 g96%
Sigma-Aldrich (Rush Stock)Germany$2.4450 g—
Sigma-AldrichGermany$2.4450 g—
Angene International LimitedUnited States$10.3225 g95%
AstaTech (2 weeks)United States$48.001 g95%
MedKoo Biosciences, IncUnited States$90.005 g98%
TargetMol ChemicalsChina → United States$1140.00200 mg—
MolnovaChina$1528.00500 mg99%
AngeneChina → Hong Kong$4266.6730 mg95%

Chemical Identity

CAS4403-90-1
PubChem CID20431
DTXSIDDTXSID2024903
FormulaC28H20N2Na2O8S2
Mol. Weight622.6 g/mol
SMILESCC1=CC(=C(C=C1)NC2=C3C(=C(C=C2)NC4=C(C=C(C=C4)C)S(=O)(=O)[O-])C(=O)C5=CC=CC=C5C3=O)S(=O)(=O)[O-].[Na+].[Na+]

Data Sources

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Brief citations

Benzenesulfonic acid, 2,2′-[(9,10-dihydro-9,10-dioxo-1,4-anthracenediyl)diimino]bis[5-methyl-, sodium salt (1:2) (CAS 4403-90-1) https://chemicalindependence.com/chemical/4403-90-1/ EPA CompTox (DSSTox): DTXSID2024903. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2024903 PubChem: 20431. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/20431 EPA Chemical Data Reporting: 4403-90-1. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 4403-90-1. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 320412 for CAS 4403-90-1. Reporting year: 2024. https://usatrade.census.gov/