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1-Naphthalenesulfonic acid, 4-amino-5-hydroxy-

CAS 83-64-7

Molecular structure of 83-64-7
US productionNot reported
Import value, 2024$2M
Top sourceIndia 50%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Production is reported production, not a complete census of factories. 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

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
IN 50%IndiaCN 47%ChinaDE 3%Germany

Why It Matters

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

Chemical Identity

CAS83-64-7
PubChem CIDNot recorded
DTXSIDDTXSID1058896
FormulaC10H9NO4S
Mol. Weight239.25 g/mol
SMILESNC1=C2C(O)=CC=CC2=C(C=C1)S(O)(=O)=O

Data Sources

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Brief citations

1-Naphthalenesulfonic acid, 4-amino-5-hydroxy- (CAS 83-64-7) https://chemicalindependence.com/chemical/83-64-7/ EPA TSCA Inventory: CAS 83-64-7. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 292221 for CAS 83-64-7. Reporting year: 2024. https://usatrade.census.gov/