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4-Hydroxy-3-nitrophenylarsonic acid

CAS 121-19-7

Arsonic acid, As-(4-hydroxy-3-nitrophenyl)-

Molecular structure of 121-19-7
US productionNot reported
Import value, 2024$537M
Top sourceChina 39%

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 293190 · basket

These shares come from HS customs code 293190, which covers 378 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 39%ChinaDE 17%GermanyIT 9%ItalyIN 7%IndiaJP 7%Japan

Why It Matters

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

Chemical Identity

CAS121-19-7
PubChem CIDNot recorded
DTXSIDDTXSID9020956
FormulaC6H6AsNO6
Mol. Weight263.037 g/mol
SMILESOC1=C(C=C(C=C1)[As](O)(O)=O)[N+]([O-])=O

Data Sources

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Brief citations

4-Hydroxy-3-nitrophenylarsonic acid (CAS 121-19-7) https://chemicalindependence.com/chemical/121-19-7/ EPA TSCA Inventory: CAS 121-19-7. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293190 for CAS 121-19-7. Reporting year: 2024. https://usatrade.census.gov/