2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4-[2-[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-2-sulfophenyl]ethenyl]-3-sulfophenyl]azo]-4-hydroxy-, compd. with 2,2',2''-nitrilotris[ethanol] (1:5)

CAS 75476-99-2

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

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 270.0K lb · Imports 26.0K lb

EPA-registered manufacturers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Kemira Water Solutions

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.

Lanxess

Why It Matters

Sectors

TextilesPaper & 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 1 functional role.

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

Chemical Identity

CAS75476-99-2

PubChem CID139595094

DTXSIDDTXSID9072814

FormulaC64H101N11O32S5

Mol. Weight1696.9 g/mol

SMILESC1=CC(=CC2=C(C(=C(C=C21)S(=O)(=O)O)N=NC3=CC(=C(C=C3)C=CC4=C(C=C(C=C4)N=NC5=C(C6=C(C=C(C=C6C=C5S(=O)(=O)O)S(=O)(=O)O)N)O)S(=O)(=O)O)S(=O)(=O)O)O)N.C(CO)N(CCO)CCO.C(CO)N(CCO)CCO.C(CO)N(CCO)CCO.C(CO)N(CCO)CCO.C(CO)N(CCO)CCO

Data Sources

EPA CompTox (DSSTox) · DTXSID9072814Retrieved 2026-04-06
PubChem · compound 139595094Retrieved 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

2,7-Naphthalenedisulfonic acid, 5-amino-3-[[4-[2-[4-[(7-amino-1-hydroxy-3-sulfo-2-naphthalenyl)azo]-2-sulfophenyl]ethenyl]-3-sulfophenyl]azo]-4-hydroxy-, compd. with 2,2',2''-nitrilotris[ethanol] (1:5) (CAS 75476-99-2) https://chemicalindependence.com/chemical/75476-99-2/ EPA CompTox (DSSTox): DTXSID9072814. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9072814 PubChem: 139595094. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/139595094 EPA Chemical Data Reporting: 75476-99-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 75476-99-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting