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4-Hydroxyazobenzene

CAS 1689-82-3

Phenol, 4-(2-phenyldiazenyl)-

Molecular structure of 1689-82-3
US productionNot reported
Import value, 2024$52M
Top sourceIndia 34%

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 320419 · basket

These shares come from HS customs code 320419, which covers 36 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IN 34%IndiaCN 14%ChinaJP 13%JapanDE 12%GermanyCA 7%Canada

Why It Matters

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

Chemical Identity

CAS1689-82-3
PubChem CIDNot recorded
DTXSIDDTXSID3022160
FormulaC12H10N2O
Mol. Weight198.225 g/mol
SMILESOC1=CC=C(C=C1)N=NC1=CC=CC=C1

Data Sources

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Brief citations

4-Hydroxyazobenzene (CAS 1689-82-3) https://chemicalindependence.com/chemical/1689-82-3/ EPA TSCA Inventory: CAS 1689-82-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 320419 for CAS 1689-82-3. Reporting year: 2024. https://usatrade.census.gov/