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2,7-Naphthalenedisulfonic acid, 6-amino-4-hydroxy-3-[2-[7-sulfo-4-[2-(4-sulfophenyl)diazenyl]-1-naphthalenyl]diazenyl]-, sodium salt (1:4)

CAS 2118-39-0

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

Molecular structure of 2118-39-0
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

$0.46/gAA BLOCKS (2 weeks)
CountryUnited States
Pack$228.00 / 500 g
PurityNot recorded
Vendors2 available

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

1 more vendor
VendorCountry$/gPackPurity
Aaron Chemicals LLCHong Kong$0.51500 g—

Chemical Identity

CAS2118-39-0
PubChem CIDNot recorded
DTXSIDDTXSID40879792
FormulaC26H15N5Na4O12S4
Mol. Weight809.63 g/mol
SMILES[Na+].[Na+].[Na+].[Na+].NC1=CC2=C(C=C1S([O-])(=O)=O)C=C(C(\N=N\C1=CC=C(\N=N\C3=CC=C(C=C3)S([O-])(=O)=O)C3=C1C=C(C=C3)S([O-])=O)=C2O)S([O-])(=O)=O

Data Sources

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Brief citations

2,7-Naphthalenedisulfonic acid, 6-amino-4-hydroxy-3-[2-[7-sulfo-4-[2-(4-sulfophenyl)diazenyl]-1-naphthalenyl]diazenyl]-, sodium salt (1:4) (CAS 2118-39-0) https://chemicalindependence.com/chemical/2118-39-0/ EPA TSCA Inventory: CAS 2118-39-0. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory