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Chlorantine Fast Red 6BLL

CAS 1937-34-4

2,7-Naphthalenedisulfonic acid, 4,4'-[carbonylbis[imino(5-methoxy-2-methyl-4,1-phenylene)-2,1-diazenediyl]]bis[5-hydroxy-, sodium salt (1:4)

EPA and Census publish no US supply data for this chemical.

Molecular structure of 1937-34-4
4 Na⁺
US productionNot reported
Top sourceNo public record

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Where It Comes From

EPA and Census publish no US supply data for this chemical.

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Vendor Pricing

$0.85/gAaron Chemicals LLC
CountryHong Kong
Pack$424.00 / 500 g
PurityNot recorded
Vendors2 available

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

1 more vendor
VendorCountry$/gPackPurity
AA BLOCKSUnited States$137.005 g90%

Chemical Identity

CAS1937-34-4
PubChem CIDNot recorded
DTXSIDDTXSID20889450
FormulaC37H28N6Na4O17S4
Mol. Weight1048.86 g/mol
SMILES[Na+].[Na+].[Na+].[Na+].COC1=C(NC(=O)NC2=C(OC)C=C(N=NC3=C4C(O)=CC(=CC4=CC(=C3)S([O-])(=O)=O)S([O-])(=O)=O)C(C)=C2)C=C(C)C(=C1)N=NC1=C2C(O)=CC(=CC2=CC(=C1)S([O-])(=O)=O)S([O-])(=O)=O

Data Sources

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Brief citations

Chlorantine Fast Red 6BLL (CAS 1937-34-4) https://chemicalindependence.com/chemical/1937-34-4/ EPA TSCA Inventory: CAS 1937-34-4. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory