Specialty Additives Available — Bulk Only

TPO Photoinitiator (Diphenyl(2,4,6-trimethylbenzoyl)phosphine Oxide)

CAS 75980-60-8 · Formula C22H21O2P · MW 348.4 g/mol

Type I acylphosphine-oxide photoinitiator tuned for UV-LED (~380-420 nm) curing of clear and white-pigmented coatings and inks (Coatings & Construction) Long-wavelength absorption drives surface and through-cure of opaque/thick UV-LED layers in printing and electronics (Industrial Manufacturing) Low-yellowing fast cure of UV-curable adhesives, composites and 3D-print resins (Plastics & Polymers)

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CAS Number
75980-60-8
Formula
C22H21O2P
Molecular Weight
348.4 g/mol
Material Family
Specialty Additives
At a Glance
Material Family
Specialty Additives
Primary Role
Crosslinking / Curing
Functional Roles
Applications & Use Cases
  • Type I acylphosphine-oxide photoinitiator tuned for UV-LED (~380-420 nm) curing of clear and white-pigmented coatings and inks (Coatings & Construction)
  • Long-wavelength absorption drives surface and through-cure of opaque/thick UV-LED layers in printing and electronics (Industrial Manufacturing)
  • Low-yellowing fast cure of UV-curable adhesives, composites and 3D-print resins (Plastics & Polymers)
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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Chemical Identity
CAS Number
75980-60-8
Molecular Formula
C22H21O2P
Molecular Weight
348.4 g/mol
IUPAC Name
diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone
PubChem CID
InChI Key
VFHVQBAGLAREND-UHFFFAOYSA-N
XLogP
5
Full Description

Type I acylphosphine-oxide photoinitiator tuned for UV-LED (~380-420 nm) curing of clear and white-pigmented coatings and inks (Coatings & Construction) Long-wavelength absorption drives surface and through-cure of opaque/thick UV-LED layers in printing and electronics (Industrial Manufacturing) Low-yellowing fast cure of UV-curable adhesives, composites and 3D-print resins (Plastics & Polymers)

Frequently Asked Questions

Is Photoinitiator TPO an equivalent to Irgacure TPO?

Photoinitiator TPO is the generic Type I/II photoinitiator commonly sold as Irgacure TPO. RawSource supplies an independent equivalent — verified to your specification and Certificate of Analysis — and is not affiliated with, authorized by, or endorsed by IGM Resins.

What is Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (CAS 75980-60-8)?

Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (CAS 75980-60-8) is a crosslinking / curing agent supplied by RawSource in bulk. Type I acylphosphine-oxide photoinitiator tuned for UV-LED (~380-420 nm) curing of clear and white-pigmented coatings and inks (Coatings & Construction)

What is the molecular formula and weight of Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide?

Molecular formula C22H21O2P, molecular weight 348.4 g/mol. IUPAC name: diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone

Is Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide hazardous?

Yes

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.