C.I. Direct Blue 273

CAS 76359-37-0

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

Molecular structure of 76359-37-0 — 3 Na⁺ · 1 Cu

US productionCBI

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

Import volumeZero

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 Zero
2019: US production Confidential · Imports Confidential

EPA-registered manufacturers (2)

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

Archroma Management Gmbh · CH Switzerland

Archroma U.S

Why It Matters

Sectors

Paper & 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

•Dye in Paper Manufacturing (100%)Processing—incorporation into article

Chemical Identity

CAS76359-37-0

PubChem CID136160640

DTXSIDDTXSID20893693

FormulaC33H25CuN5Na3O11S3+3

Mol. Weight896.3 g/mol

SMILESCC1=CC(=C(C=C1N=NC2=CC3=C(C=CC=C3S(=O)(=O)O)C(=C2)S(=O)(=O)O)O)N=NC4=C(C=C5C=C(C=CC5=C4O)NC6=CC=CC=C6)S(=O)(=O)O.[Na+].[Na+].[Na+].[Cu]

Data Sources

EPA CompTox (DSSTox) · DTXSID20893693Retrieved 2026-04-06
PubChem · compound 136160640Retrieved 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

C.I. Direct Blue 273 (CAS 76359-37-0) https://chemicalindependence.com/chemical/76359-37-0/ EPA CompTox (DSSTox): DTXSID20893693. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID20893693 PubChem: 136160640. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/136160640 EPA Chemical Data Reporting: 76359-37-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 76359-37-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting