Flag of the United StatesAmerican Chemical Independence

Isopropenylphosphonic acid

CAS 4721-36-2

Phosphonic acid, P-(1-methylethenyl)-

EPA and Census publish no US supply data for this chemical.

Molecular structure of 4721-36-2
US productionNot reported
Top sourceNo public record

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

Where It Comes From

EPA and Census publish no US supply data for this chemical.

Why It Matters

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

Chemical Identity

CAS4721-36-2
PubChem CIDNot recorded
DTXSIDDTXSID5063572
FormulaC3H7O3P
Mol. Weight122.06 g/mol
SMILESCC(=C)P(O)(O)=O

Data Sources

← Back to Dashboard

Brief citations

Isopropenylphosphonic acid (CAS 4721-36-2) https://chemicalindependence.com/chemical/4721-36-2/ EPA TSCA Inventory: CAS 4721-36-2. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory