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Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide

CAS 75980-60-8

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

Molecular structure of 75980-60-8
US productionCBI
Import value, 2024$598M
Top sourceChina 89%

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 293149 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 293149, which covers 114 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 89%ChinaIN 4%IndiaCA 3%CanadaDE 2%GermanyAR 1%Argentina
Domestic parents -- activity not disclosed (1)
Covestro
EPA-registered importers (6)
Rahn Ag · CH Switzerland
Aalborz Chemical
Arkema
Chitec Technology
Igm Resins Charlotte
Show all 6
Rahn Usa

Why It Matters

Sectors
HealthConstructionMetals & MiningPaints & CoatingsPaper & Printing
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 6 sectors as 3 functional roles.

  • •Photosensitive agent in Adhesive ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Photosensitive agent in Paint and Coating ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Photosensitive agent in Printing and Related Support ActivitiesProcessing—incorporation into formulation, mixture, or reaction product
  • •Photosensitive agent in Miscellaneous ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Photosensitive agent in Printing Ink Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
  • •Tanning agents not otherwise specified in Pharmaceutical and Medicine Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
  • •Pigment in Printing Ink Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS75980-60-8
PubChem CID166480
DTXSIDDTXSID4052502
FormulaC22H21O2P
Mol. Weight348.4 g/mol
SMILESCC1=CC(=C(C(=C1)C)C(=O)P(=O)(C2=CC=CC=C2)C3=CC=CC=C3)C

Data Sources

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Brief citations

Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (CAS 75980-60-8) https://chemicalindependence.com/chemical/75980-60-8/ EPA CompTox (DSSTox): DTXSID4052502. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4052502 PubChem: 166480. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/166480 EPA Chemical Data Reporting: 75980-60-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 75980-60-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293149 for CAS 75980-60-8. Reporting year: 2024. https://usatrade.census.gov/