C.I. Direct Red 239

CAS 28706-25-4

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

Molecular structure of 28706-25-4 — 4 Na⁺

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 Confidential · Imports Confidential

EPA-registered manufacturers (3)

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

Sensient Colors

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 2 sectors as 1 functional role.

•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

CAS28706-25-4

PubChem CID135853609

DTXSIDDTXSID50889701

FormulaC41H24N6Na4O15S4

Mol. Weight1060.9 g/mol

SMILESC1=CC2=C(C(=C(C=C2C=C1NC(=O)NC3=CC4=CC(=C(C(=C4C=C3)O)N=NC5=CC6=C(C=C5)C=C(C=C6)S(=O)(=O)[O-])S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC7=CC8=C(C=C7)C=C(C=C8)S(=O)(=O)[O-])O.[Na+].[Na+].[Na+].[Na+]

Data Sources

EPA CompTox (DSSTox) · DTXSID50889701Retrieved 2026-04-06
PubChem · compound 135853609Retrieved 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 Red 239 (CAS 28706-25-4) https://chemicalindependence.com/chemical/28706-25-4/ EPA CompTox (DSSTox): DTXSID50889701. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID50889701 PubChem: 135853609. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/135853609 EPA Chemical Data Reporting: 28706-25-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 28706-25-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting