4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid

CAS 90-20-0

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

US productionZero

Import value, 2024$2M

Import volume67.9K lb

Import dependency100%

Top sourceIndia 50%

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.

4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid · US import value by year

2013: $3M · Peak 2014: $5M · 2024: $2M · 2025: $1M

Where It Comes From

Customs basis: HS 292221 · basket

EPA reports by year

2023: US production Zero · Imports 67.9K lb
2019: US production Zero · Imports 241.1K lb

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 (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Liberty Specialty Chemicals

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Vendor Pricing

$0.03/gAaron Chemicals LLC

CountryHong Kong

Pack$16.00 / 500 g

Purity98%

Vendors13 available

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

12 more vendors

Vendor	Country	$/g	Pack	Purity
Angene Chemical	China → Hong Kong	$0.04	500 g	97%
A2B Chem LLC	United States	$0.12	500 g	97%
AA BLOCKS	United States	$0.14	500 g	95%
Ambeed, Inc.	United States	$0.17	500 g	98%
Combi-Blocks, Inc.	United States	$0.25	1 kg	97%
AK Scientific Specialized	United States	$0.30	500 g	95%
Angene International Limited	United States	$0.53	500 g	95%
AK Scientific, Inc.	United States	$0.75	100 g	98%
MedChemExpress MCE	Sweden	$0.80	100 g	97%
Fluorochem UK	United Kingdom	$7.15	1 g	95%
AstaTech (2 weeks)	United States	$9.60	5 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	97%

Chemical Identity

CAS90-20-0

PubChem CID7009

DTXSIDDTXSID0046981

FormulaC10H9NO7S2

Mol. Weight319.3 g/mol

SMILESC1=C2C=C(C=C(C2=C(C=C1S(=O)(=O)O)N)O)S(=O)(=O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID0046981Retrieved 2026-04-06
PubChem · compound 7009Retrieved 2026-04-06
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

4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid (CAS 90-20-0) https://chemicalindependence.com/chemical/90-20-0/ EPA CompTox (DSSTox): DTXSID0046981. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0046981 PubChem: 7009. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/7009 EPA Chemical Data Reporting: 90-20-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292221 for CAS 90-20-0. Reporting year: 2024. https://usatrade.census.gov/