C.I. Pigment Red 23

CAS 6471-49-4

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 2019 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: 2019.

Where It Comes From

EPA reports by year

2023: US production Not published · Imports Not published
2019: US production Confidential · Imports Confidential

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.

H.I.G. Colors

Why It Matters

Sectors

Consumer ProductsPaints & CoatingsPaper & 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.

•Pigment in Paint and Coating Manufacturing (3%)Processing—incorporation into formulation, mixture, or reaction product
•Pigment in Printing Ink Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
•Pigment in Wholesale and Retail Trade (10%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$101.00/gAK Scientific, Inc.

CountryUnited States

Pack$101.00 / 1 g

PurityNot recorded

Vendors4 available

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

3 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$109.00	1 g	—
AA BLOCKS	United States	$113.00	1 g	—
Angene International Limited	United States	$191.00	1 g	—

Chemical Identity

CAS6471-49-4

PubChem CID22979

DTXSIDDTXSID3021227

FormulaC24H17N5O7

Mol. Weight487.4 g/mol

SMILESCOC1=C(C=C(C=C1)[N+](=O)[O-])N=NC2=C(C(=CC3=CC=CC=C32)C(=O)NC4=CC(=CC=C4)[N+](=O)[O-])O

Data Sources

EPA CompTox (DSSTox) · DTXSID3021227Retrieved 2026-04-06
PubChem · compound 22979Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04

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Brief citations

C.I. Pigment Red 23 (CAS 6471-49-4) https://chemicalindependence.com/chemical/6471-49-4/ EPA CompTox (DSSTox): DTXSID3021227. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3021227 PubChem: 22979. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/22979 EPA Chemical Data Reporting: 6471-49-4. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 6471-49-4. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting