Propanoic acid, 3-[[bis(1-methylethoxy)phosphinothioyl]thio]-, ethyl ester

CAS 71735-74-5

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$760M

Top sourceChina 33%

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. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 293090 · basket

EPA reports by year

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

These shares come from HS customs code 293090, which covers 418 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 33%ChinaES 14%SpainCH 9%SwitzerlandIT 7%ItalyIN 7%India

Israel
Croatia
Ukraine
Slovakia
United Arab Emirates
Ireland
Poland
Lithuania
Brazil
Singapore
Australia
Armenia
Hong Kong
Vietnam
Czech Republic
Hungary
Greece
Russia

EPA-registered importers (4)

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

Basf Se · DE Germany

Blaser Swisslube Ag · CH Switzerland

Basf

Blaser Swisslube Holding

Why It Matters

Sectors

EnergyMetals & Mining

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.

•Lubricating agent in Petroleum Lubricating Oil and Grease Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Lubricating agent in Fabricated Metal Product Manufacturing (100%)Use—non-incorporative activities

Chemical Identity

CAS71735-74-5

PubChem CID155666

DTXSIDDTXSID7072416

FormulaC11H23O4PS2

Mol. Weight314.4 g/mol

SMILESCCOC(=O)CCSP(=S)(OC(C)C)OC(C)C

Data Sources

EPA CompTox (DSSTox) · DTXSID7072416Retrieved 2026-04-06
PubChem · compound 155666Retrieved 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

Propanoic acid, 3-[[bis(1-methylethoxy)phosphinothioyl]thio]-, ethyl ester (CAS 71735-74-5) https://chemicalindependence.com/chemical/71735-74-5/ EPA CompTox (DSSTox): DTXSID7072416. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7072416 PubChem: 155666. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/155666 EPA Chemical Data Reporting: 71735-74-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 71735-74-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293090 for CAS 71735-74-5. Reporting year: 2024. https://usatrade.census.gov/