Description

2,4,6-Trimethylbenzoyl diphenylphosphine oxide (CAS No. 75980-60-8) is a highly efficient photoinitiator widely used in UV-curable coatings, inks, and adhesives. With the molecular formula C₂₂H₂₁O₂P and IUPAC name diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone, this compound exhibits exceptional reactivity under UV light, enabling rapid polymerization for industrial applications. Its robust chemical structure ensures stability and performance in demanding environments. Ideal for formulations requiring deep curing and low yellowing, this photoinitiator is a preferred choice for high-end optical and electronic materials. Packaged under inert conditions to maintain purity and shelf life, it is available in various quantities to suit laboratory and production-scale needs.

Properties

• CAS Number: 75980-60-8
• Complexity: 468
• 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
• InChI Key: VFHVQBAGLAREND-UHFFFAOYSA-N
• Exact Mass: 348.12791691
• Molecular Formula: C22H21O2P
• Molecular Weight: 348.4
• SMILES: CC1=CC(=C(C(=C1)C)C(=O)P(=O)(C2=CC=CC=C2)C3=CC=CC=C3)C
• Topological: 34.1
• Monoisotopic Mass: 348.12791691
• Physical Description: NKRA; Pellets or Large Crystals, Liquid; Liquid; Dry Powder
• Synonyms: 75980-60-8, Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, Phosphine oxide, diphenyl(2,4,6-trimethylbenzoyl)-, EINECS 278-355-8, DTXSID4052502, B9EIM2D97X, 2,4,6-trimethylbenzoyl diphenylphosphine oxide, trimethylbenzoyl diphenylphosphine oxide, CHIVACURE TPO, DOUBLECURE TPO, ADDITOL TPO, GENOCURE TPO, Methanone, (diphenylphosphinyl)(2,4,6-trimethylphenyl)-, DTXCID8031075, EC 278-355-8, (2,4,6-trimethylbenzoyl)diphenylphosphine oxide, (DIPHENYLPHOSPHINYL)(2,4,6-TRIMETHYLPHENYL)METHANONE, TRIMETHYLBENZOYL DIPHENYLPHOSPHINE OXIDE [INCI], 278-355-8, (Diphenylphosphoryl)(mesityl)methanone, 2,4,6-trimethyl benzoyldiphenyl phosphine oxide, 2,4,6-Trimethylbenzoyldiphenylphosphine oxide, diphenyl(2,4,6-trimethylbenzoyl)phosphineoxide, diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone, diphenyl (2,4,6-trimethylbenzoyl)phosphine oxide, UNII-B9EIM2D97X, diphenylphosphino[(2,4,6-trimethylphenyl)carbonyl]-1-one, MFCD00192110, di(phenyl)phosphoryl-(2,4,6-trimethylphenyl)methanone, SCHEMBL27651, CHEMBL3561198, VFHVQBAGLAREND-UHFFFAOYSA-, Tox21_303757, SBB057714, AKOS015840661, CS-W009334, FD40112, NCGC00357056-01, AC-10380, AS-14718, CAS-75980-60-8, 2,4,6-Trimethylbenzoyldi phenylphosphinoxide, D3358, NS00002047, ST51006885, 2,4,6-trimethylbenzoyl-diphenyl-phosphineoxide, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, O11728, diphenyl(2,4,6-trimethylbenzoyl)phosphorus oxide, diphenyl-(2,4,6-trimethylbenzoyl) phosphine oxide, Diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, 97%, Q27274548, DIPHENYL-(2,4,6-TRIMETHYLBENZOYL) PHOSPHINOXID, Lucirin TPO solid (2,4,6-trimethylbenzoyldiphenyl phosphine oxide), InChI=1/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

Application

2,4,6-Trimethylbenzoyl diphenylphosphine oxide is primarily used as a photoinitiator in UV-curable systems, such as coatings, inks, and adhesives, due to its high reactivity and efficiency. It is particularly valuable in applications requiring deep-section curing, such as in thick films or pigmented formulations. The compound is also employed in the production of optical lenses, electronic encapsulants, and dental materials, where low yellowing and high clarity are critical. Its compatibility with a wide range of monomers and oligomers makes it versatile for various industrial and research applications.

Safety and Hazards

GHS Hazard Statements

• H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
• H361f: Suspected of damaging fertility [Warning Reproductive toxicity]

Precautionary Statements

• P203, P261, P272, P280, P302+P352, P318, P321, P333+P317, P362+P364, P405, and P501

Hazard Classes and Categories

• Skin Sens. 1 (12.5%)
• Repr. 2 (95.3%)
• Aquatic Chronic 2 (87%)

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