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5,5-Dimethyl-2-phenoxy-1,3,2-dioxaphosphinane

CAS 3057-08-7

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

Molecular structure of 3057-08-7
US productionCBI
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)
Si Group

Why It Matters

Sectors
Plastics & Rubber
Downstream UsesNot recorded
FDA Shortage Status
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

$2250.00/gA2B Chem LLC
CountryUnited States
Pack$2250.00 / 1 g
Purity95%
Vendors3 available

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

2 more vendors
VendorCountry$/gPackPurity
AA BLOCKSUnited States$2500.001 g95%
Angene International LimitedUnited States$3836.001 g95%

Chemical Identity

CAS3057-08-7
PubChem CID76464
DTXSIDDTXSID6044646
FormulaC11H15O3P
Mol. Weight226.21 g/mol
SMILESCC1(COP(OC1)OC2=CC=CC=C2)C

Data Sources

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Brief citations

5,5-Dimethyl-2-phenoxy-1,3,2-dioxaphosphinane (CAS 3057-08-7) https://chemicalindependence.com/chemical/3057-08-7/ EPA CompTox (DSSTox): DTXSID6044646. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6044646 PubChem: 76464. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/76464 EPA Chemical Data Reporting: 3057-08-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3057-08-7. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting