(5-Ethyl-2-methyl-1,3,2-dioxaphosphorinan-5-yl)methyl dimethyl phosphonate P-oxide

CAS 41203-81-0

U.S. production volumes are classified as confidential business information.

US productionCBI

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

Import value, 2024$7K

Import volume385.5K lb

Top sourceChina 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. US production volume is confidential. Production reporting year: 2023.

Where It Comes From

Customs basis: HS 293147 · exact

EPA reports by year

2023: US production Confidential · Imports 385.5K lb
2019: US production Confidential · Imports Confidential

Source Countries

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

CN 100%China

EPA-registered manufacturers (1)

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

Lanxess

EPA-registered importers (1)

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

Special Materials

Why It Matters

Sectors

Metals & MiningTextiles

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 Miscellaneous Manufacturing (100%)Use—non-incorporative activities

Chemical Identity

CAS41203-81-0

PubChem CID94516

DTXSIDDTXSID8029363

FormulaC9H20O6P2

Mol. Weight286.2 g/mol

SMILESCCC1(COP(=O)(OC1)C)COP(=O)(C)OC

Data Sources

EPA CompTox (DSSTox) · DTXSID8029363Retrieved 2026-04-06
PubChem · compound 94516Retrieved 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

← Back to Dashboard ← Back to Metals & Mining

Brief citations

(5-Ethyl-2-methyl-1,3,2-dioxaphosphorinan-5-yl)methyl dimethyl phosphonate P-oxide (CAS 41203-81-0) https://chemicalindependence.com/chemical/41203-81-0/ EPA CompTox (DSSTox): DTXSID8029363. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8029363 PubChem: 94516. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/94516 EPA Chemical Data Reporting: 41203-81-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 41203-81-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293147 for CAS 41203-81-0. Reporting year: 2024. https://usatrade.census.gov/