Bis(1-methylethyl) methylphosphonate

CAS 1445-75-6

Phosphonic acid, P-methyl-, bis(1-methylethyl) ester

US productionNot reported

Import value, 2024$598M

Top sourceChina 89%

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 293149 · basket

These shares come from HS customs code 293149, which covers 114 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

CN 89%ChinaIN 4%IndiaCA 3%CanadaDE 2%GermanyAR 1%Argentina

United Kingdom
Italy
Mexico
Japan
Switzerland
Hong Kong
Ukraine
Finland
Sweden
Spain
Poland
Slovakia
Netherlands
Singapore
Taiwan
South Korea
Czech Republic

Why It Matters

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

Chemical Identity

CAS1445-75-6

PubChem CIDNot recorded

DTXSIDDTXSID5024051

FormulaC7H17O3P

Mol. Weight180.184 g/mol

SMILESCC(C)OP(C)(=O)OC(C)C

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Bis(1-methylethyl) methylphosphonate (CAS 1445-75-6) https://chemicalindependence.com/chemical/1445-75-6/ EPA TSCA Inventory: CAS 1445-75-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293149 for CAS 1445-75-6. Reporting year: 2024. https://usatrade.census.gov/