Methyl phosphonic acid

CAS 993-13-5

EPA’s 2023 records show zero U.S. production of this chemical.

US productionZero

Import value, 2024$2K

Import volumeCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceGermany 100%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. Production reporting year: 2023.

Where It Comes From

Customs basis: HS 293144 · exact

EPA reports by year

2023: US production Zero · Imports Confidential
2019: US production Confidential · Imports Confidential

Source Countries

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

DE 100%Germany

EPA-registered importers (2)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Archroma Management Gmbh · CH Switzerland

Archroma U.S

Why It Matters

Sectors

Textiles

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 2 sectors as 1 functional role.

•Flame retardant in Textiles, apparel, and leather manufacturing (100%)Processing—incorporation into article
•Flame retardant in Synthetic Dye and Pigment Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS993-13-5

PubChem CID13818

DTXSIDDTXSID5047748

FormulaCH5O3P

Mol. Weight96.022 g/mol

SMILESCP(=O)(O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID5047748Retrieved 2026-04-06
PubChem · compound 13818Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Methyl phosphonic acid (CAS 993-13-5) https://chemicalindependence.com/chemical/993-13-5/ EPA CompTox (DSSTox): DTXSID5047748. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID5047748 PubChem: 13818. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/13818 EPA Chemical Data Reporting: 993-13-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 993-13-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293144 for CAS 993-13-5. Reporting year: 2024. https://usatrade.census.gov/