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5(4H)-Isoxazolone, 3-phenyl-

CAS 1076-59-1

Molecular structure of 1076-59-1
US productionNot reported
Import value, 2024$6.4B
Top sourceSingapore 36%

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 293499 · basket

These shares come from HS customs code 293499, which covers 575 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India

Why It Matters

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

Chemical Identity

CAS1076-59-1
PubChem CIDNot recorded
DTXSIDDTXSID3061473
FormulaC9H7NO2
Mol. Weight161.16 g/mol
SMILESO=C1CC(=NO1)C1=CC=CC=C1

Data Sources

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Brief citations

5(4H)-Isoxazolone, 3-phenyl- (CAS 1076-59-1) https://chemicalindependence.com/chemical/1076-59-1/ EPA TSCA Inventory: CAS 1076-59-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293499 for CAS 1076-59-1. Reporting year: 2024. https://usatrade.census.gov/