7-Amino-4-hydroxynaphthalene-2-sulfonic acid

CAS 87-02-5

EPA’s 2023 records show zero U.S. production of this chemical.

US productionZero

Import value, 2024$2M

Import volumeCBI

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

Top sourceIndia 50%

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. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292221 · basket

EPA reports by year

2023: US production Zero · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 292221, which covers 8 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 50%IndiaCN 47%ChinaDE 3%Germany

EPA-registered importers (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

Liberty Specialty Chemicals

Why It Matters

Sectors

Textiles

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

•Intermediate in Synthetic Dye and Pigment Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.25/gAA BLOCKS

CountryUnited States

Pack$126.00 / 500 g

Purity95%

Vendors17 available

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

16 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$0.40	500 g	95%
Angene Chemical	China → Hong Kong	$0.46	500 g	95%
A2B Chem LLC	United States	$0.50	500 g	95%
Combi-Blocks, Inc.	United States	$0.51	1 kg	95%
BLD Pharmatech Ltd.	China	$0.56	1 kg	95%
BLD Pharmatech Co., Limited	United States	$0.65	500 g	95%
Ambeed, Inc.	United States	$0.65	500 g	95%
Fluorochem EU	Germany	$0.85	100 g	90%
AK Scientific, Inc.	United States	$0.87	100 g	95%
Sigma-Aldrich (Rush Stock)	Germany	$0.90	100 g	90%
Sigma-Aldrich	Germany	$0.90	100 g	90%
AstaTech (2 weeks)	United States	$1.17	100 g	95%
BLD Pharmatech GmbH	Germany	$1.28	25 g	95%
Angene International Limited	United States	$1.69	100 g	95%
Labotest KG	Germany	$217.80	5000 mg	90%
Angene	China → Hong Kong	$4266.67	30 mg	95%

Chemical Identity

CAS87-02-5

PubChem CID6868

DTXSIDDTXSID7026520

FormulaC10H9NO4S

Mol. Weight239.25 g/mol

SMILESC1=CC2=C(C=C(C=C2C=C1N)S(=O)(=O)O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID7026520Retrieved 2026-04-06
PubChem · compound 6868Retrieved 2026-04-06
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

7-Amino-4-hydroxynaphthalene-2-sulfonic acid (CAS 87-02-5) https://chemicalindependence.com/chemical/87-02-5/ EPA CompTox (DSSTox): DTXSID7026520. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7026520 PubChem: 6868. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6868 EPA Chemical Data Reporting: 87-02-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 87-02-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292221 for CAS 87-02-5. Reporting year: 2024. https://usatrade.census.gov/