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

• CAT Number: L012140
• CAS Number: 75980-60-8
• Molecular Formula: C22H21O2P
• Molecular Weight: 348.40
• Purity: ≥95%
• IUPAC Name: diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone
• InChI: InChI=1S/C22H21O2P/c1-16-14-17(2)21(18(3)15-16)22(23)25(24,19-10-6-4-7-11-19)20-12-8-5-9-13-20/h4-15H,1-3H3
• InChIKey: VFHVQBAGLAREND-UHFFFAOYSA-N
• SMILES: CC1=CC(=C(C(=C1)C)C(=O)P(=O)(C2=CC=CC=C2)C3=CC=CC=C3)C

Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (Cat No.:L012140) is a high-performance photoinitiator used primarily in UV-curable formulations. With the molecular formula C22H21O2P, it features a phosphine oxide core bonded to a 2,4,6-trimethylbenzoyl group and two phenyl rings. TPO is valued for its strong absorption in the near-UV range and efficient radical generation, making it ideal for polymerization of acrylates in coatings, inks, adhesives, and dental materials. It offers excellent depth curing and color stability. Typically supplied as a pale yellow powder, TPO should be handled with care under light-protected, dry conditions.