Phosphorous acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl triesters

CAS 939402-02-5

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.

Top sourceNo public record

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

EPA reports by year

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

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Si Group

EPA-registered importers (5)

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

Government Of Abu Dhabi · AE United Arab Emirates

Lg Chem · KR South Korea

Dow Chemical

Lg Chem America

Nc Holdings Usa

Why It Matters

Sectors

ConstructionMetals & MiningPlastics & Rubber

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 7 sectors as 3 functional roles.

•Antioxidant in Plastics Material and Resin Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
•Antioxidant in Synthetic Rubber Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•UV stabilizer in Plastics Material and Resin Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
•UV stabilizer in Synthetic Rubber Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Chemical reaction regulator in Plastics Material and Resin Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Chemical reaction regulator in Synthetic Rubber Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
•Antioxidant in Adhesive Manufacturing (0%)Processing—incorporation into formulation, mixture, or reaction product
•Antioxidant in Plastics Product Manufacturing (90%)Processing—incorporation into article
•Antioxidant in Other (20%)Processing—repackaging
•Antioxidant in Custom Compounding of Purchased Resins (0%)Processing—incorporation into formulation, mixture, or reaction product
•Antioxidant in Asphalt Paving, Roofing, and Coating Materials Manufacturing (100%)Processing—incorporation into article

Chemical Identity

CAS939402-02-5

PubChem CIDNot recorded

DTXSIDDTXSID201024938

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA CompTox (DSSTox) · DTXSID201024938Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

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Brief citations

Phosphorous acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl triesters (CAS 939402-02-5) https://chemicalindependence.com/chemical/939402-02-5/ EPA CompTox (DSSTox): DTXSID201024938. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID201024938 EPA Chemical Data Reporting: 939402-02-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 939402-02-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting