Phosphorous acid, (1-methylethylidene)di-4,1-phenylene tetra-C12-15-alkyl esters

CAS 96152-48-6

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$368M

Top sourceIndonesia 19%

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 381239 · basket

EPA reports by year

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

These shares come from HS customs code 381239, which covers 9 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).

ID 19%IndonesiaMX 11%MexicoNL 11%NetherlandsCA 9%CanadaIN 9%India

Slovakia
Spain
Brunei
Singapore
Vietnam
Belgium
Lebanon
Poland
United Arab Emirates
Israel
Hungary
Finland
South Africa
Sweden
Czech Republic

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.

Dover Chemical

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

Why It Matters

Sectors

Plastics & 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 2 sectors as 3 functional roles.

•UV stabilizer in Plastics Material and Resin Manufacturing (90%)Processing—incorporation into formulation, mixture, or reaction product
•Antioxidant 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
•Antioxidant in Synthetic Rubber Manufacturing (10%)Processing—incorporation into formulation, mixture, or reaction product
•Stabilizing agent in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS96152-48-6

PubChem CIDNot recorded

DTXSIDDTXSID30105517

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA CompTox (DSSTox) · DTXSID30105517Retrieved 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

Phosphorous acid, (1-methylethylidene)di-4,1-phenylene tetra-C12-15-alkyl esters (CAS 96152-48-6) https://chemicalindependence.com/chemical/96152-48-6/ EPA CompTox (DSSTox): DTXSID30105517. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID30105517 EPA Chemical Data Reporting: 96152-48-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 96152-48-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 381239 for CAS 96152-48-6. Reporting year: 2024. https://usatrade.census.gov/