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Phosphoric acid, mono(1-methylethyl) ester

CAS 1623-24-1

Molecular structure of 1623-24-1
US productionNot reported
Import value, 2024$123M
Top sourceChina 66%

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 291990 · basket

These shares come from HS customs code 291990, which covers 77 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 66%ChinaDE 18%GermanyJP 5%JapanIN 3%IndiaCH 3%Switzerland

Why It Matters

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

Chemical Identity

CAS1623-24-1
PubChem CIDNot recorded
DTXSIDDTXSID40862720
FormulaC3H9O4P
Mol. Weight140.075 g/mol
SMILESCC(C)OP(O)(O)=O

Data Sources

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Brief citations

Phosphoric acid, mono(1-methylethyl) ester (CAS 1623-24-1) https://chemicalindependence.com/chemical/1623-24-1/ EPA TSCA Inventory: CAS 1623-24-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 291990 for CAS 1623-24-1. Reporting year: 2024. https://usatrade.census.gov/