C.I. Direct Blue 71

CAS 4399-55-7

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

Molecular structure of 4399-55-7 — 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

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

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

Vendor Pricing

$0.71/gAA BLOCKS

CountryUnited States

Pack$706.00 / 1 kg

Purity50%

Vendors4 available

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

3 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$1.40	500 g	50%
Sigma-Aldrich (Rush Stock)	Germany	$2.51	50 g	—
Sigma-Aldrich	Germany	$2.51	50 g	—

Chemical Identity

CAS4399-55-7

PubChem CID20427

DTXSIDDTXSID5044944

FormulaC40H23N7Na4O13S4

Mol. Weight1029.9 g/mol

SMILESC1=CC=C2C(=C1)C(=CC=C2N=NC3=CC4=C(C=CC=C4S(=O)(=O)[O-])C(=C3)S(=O)(=O)[O-])N=NC5=C6C=CC(=CC6=C(C=C5)N=NC7=C(C=C8C=C(C=CC8=C7O)N)S(=O)(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Na+]

Data Sources

EPA CompTox (DSSTox) · DTXSID5044944Retrieved 2026-04-06
PubChem · compound 20427Retrieved 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 71 (CAS 4399-55-7) https://chemicalindependence.com/chemical/4399-55-7/ EPA CompTox (DSSTox): DTXSID5044944. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID5044944 PubChem: 20427. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/20427 EPA Chemical Data Reporting: 4399-55-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 4399-55-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting