Bis(2-ethylhexyl) phenyl phosphite

CAS 3164-60-1

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 2019 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: 2019.

Where It Comes From

EPA reports by year

2019: US production Confidential · Imports Confidential

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.

Si Group Usa (Usaa)

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 2 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

Vendor Pricing

$0.17/gA2B Chem LLC (2 weeks)

CountryUnited States

Pack$435.00 / 2.5 kg

PurityNot recorded

Vendors3 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

2 more vendors

Vendor	Country	$/g	Pack	Purity
AA BLOCKS (2 weeks)	United States	$0.18	2.5 kg	—
Aaron Chemicals LLC	Hong Kong	$0.34	500 g	—

Chemical Identity

CAS3164-60-1

PubChem CID102947

DTXSIDDTXSID80863115

FormulaC22H39O3P

Mol. Weight382.5 g/mol

SMILESCCCCC(CC)COP(OCC(CC)CCCC)OC1=CC=CC=C1

Data Sources

EPA CompTox (DSSTox) · DTXSID80863115Retrieved 2026-04-06
PubChem · compound 102947Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04

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Brief citations

Bis(2-ethylhexyl) phenyl phosphite (CAS 3164-60-1) https://chemicalindependence.com/chemical/3164-60-1/ EPA CompTox (DSSTox): DTXSID80863115. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID80863115 PubChem: 102947. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/102947 EPA Chemical Data Reporting: 3164-60-1. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3164-60-1. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting