Specialty Additives Available — Bulk Only

BAPO Photoinitiator (Phenylbis(2,4,6-trimethylbenzoyl)phosphine Oxide)

CAS 162881-26-7 · Formula C26H27O3P · MW 418.5 g/mol

Type I bis-acylphosphine-oxide (BAPO) photoinitiator giving deep through-cure of pigmented and white UV coatings (Coatings & Construction) Long-wavelength absorption suits UV-LED and thick-film inks/electronics where surface initiators fail to cure depth (Industrial Manufacturing) Cures thick UV/EB adhesives, gel coats and composite layers with low yellowing (Plastics & Polymers)

Request SDS
CAS Number
162881-26-7
Formula
C26H27O3P
Molecular Weight
418.5 g/mol
Material Family
Specialty Additives
At a Glance
Material Family
Specialty Additives
Primary Role
Crosslinking / Curing
Functional Roles
Applications & Use Cases
  • Type I bis-acylphosphine-oxide (BAPO) photoinitiator giving deep through-cure of pigmented and white UV coatings (Coatings & Construction)
  • Long-wavelength absorption suits UV-LED and thick-film inks/electronics where surface initiators fail to cure depth (Industrial Manufacturing)
  • Cures thick UV/EB adhesives, gel coats and composite layers with low yellowing (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.

Request SDS →
Chemical Identity
CAS Number
162881-26-7
Molecular Formula
C26H27O3P
Molecular Weight
418.5 g/mol
IUPAC Name
-(2,4,6-trimethylphenyl)methanone
PubChem CID
InChI Key
GUCYFKSBFREPBC-UHFFFAOYSA-N
XLogP
6
Full Description

Type I bis-acylphosphine-oxide (BAPO) photoinitiator giving deep through-cure of pigmented and white UV coatings (Coatings & Construction) Long-wavelength absorption suits UV-LED and thick-film inks/electronics where surface initiators fail to cure depth (Industrial Manufacturing) Cures thick UV/EB adhesives, gel coats and composite layers with low yellowing (Plastics & Polymers)

Frequently Asked Questions

Is BAPO photoinitiator (819) an equivalent to Irgacure 819?

BAPO photoinitiator (819) is the generic Type I/II photoinitiator commonly sold as Irgacure 819. 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 Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (CAS 162881-26-7)?

Phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide (CAS 162881-26-7) is a crosslinking / curing agent supplied by RawSource in bulk. Type I bis-acylphosphine-oxide (BAPO) photoinitiator giving deep through-cure of pigmented and white UV coatings (Coatings & Construction)

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

Molecular formula C26H27O3P, molecular weight 418.5 g/mol. IUPAC name: -(2,4,6-trimethylphenyl)methanone

Is Phenylbis(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.