C.I.Acid Blue 25

CAS 6408-78-2

2-Anthracenesulfonic acid, 1-amino-9,10-dihydro-9,10-dioxo-4-(phenylamino)-, sodium salt (1:1)

Companies reported imports and no US production of this chemical to EPA for 2023.

Molecular structure of 6408-78-2 — 1 Na⁺

US productionZero

Import value, 2024$56M

Import volume17.6K lb

Import dependency100%

Top sourceIndia 70%

Production is reported production, not a complete census of factories. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

C.I.Acid Blue 25 · US import value by year

2013: $63M · Peak 2022: $90M · 2024: $56M · 2025: $58M

Where It Comes From

Customs basis: HS 320412 · basket

EPA reports by year

2023: US production Zero · Imports 17.6K lb

These shares come from HS customs code 320412, which covers 106 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

IN 70%IndiaMY 7%MalaysiaCH 4%SwitzerlandCN 4%ChinaDE 3%Germany

Ireland
United Kingdom
Spain
South Korea
Denmark
Pakistan
Hong Kong
Czech Republic
Brazil
Turkey

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.

Aakash Chemicals

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 Textiles, apparel, and leather manufacturingProcessing—incorporation into article
•Dye in Paper Manufacturing (0%)Processing—incorporation into article

Vendor Pricing

$2.53/gA2B Chem LLC

CountryUnited States

Pack$253.00 / 100 g

Purity95%

Vendors9 available

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

8 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$2.70	100 g	45%
Angene Chemical	China → Hong Kong	$2.73	100 g	45%
AK Scientific, Inc.	United States	$2.85	100 g	95%
AA BLOCKS	United States	$3.17	100 g	95%
Angene International Limited	United States	$4.73	100 g	95%
Sigma-Aldrich (Rush Stock)	Germany	$8.98	25 g	—
Sigma-Aldrich	Germany	$8.98	25 g	—
Angene	China → Hong Kong	$4266.67	30 mg	45%

Chemical Identity

CAS6408-78-2

PubChem CIDNot recorded

DTXSIDDTXSID2044711

FormulaC20H13N2NaO5S

Mol. Weight416.38 g/mol

SMILES[Na+].NC1=C(C=C(NC2=CC=CC=C2)C2=C1C(=O)C1=C(C=CC=C1)C2=O)S([O-])(=O)=O

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

C.I.Acid Blue 25 (CAS 6408-78-2) https://chemicalindependence.com/chemical/6408-78-2/ EPA TSCA Inventory: CAS 6408-78-2. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 6408-78-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 6408-78-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 320412 for CAS 6408-78-2. Reporting year: 2024. https://usatrade.census.gov/