TPO Photoinitiator (CAS 75980-60-8),
Trimethylbenzoyl Diphenylphosphine Oxide, is a
Type I radical UV curing photoinitiator used in industrial polymerization systems. It generates free radicals under UV light (380–420 nm) to initiate fast curing in UV coatings, UV inks, and UV adhesive formulations. TPO Photoinitiator is widely selected by UV coating manufacturers, UV ink formulators, and UV adhesive producers because it combines fast surface curing with stable reactivity in medium-depth layers. It is suitable for LED UV and mercury lamp curing systems requiring high efficiency and low yellowing
performance.
UVIXE TPO Photoinitiator provides stable batch performance, controlled purity, and export-ready documentation (TDS, SDS, COA), supporting global industrial supply chains.
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Technical Data Sheet – TPO Photoinitiator
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| Property |
Specification |
| Chemical Name |
Trimethylbenzoyl Diphenylphosphine Oxide |
| CAS No. |
75980-60-8 |
| Appearance |
Light yellow powder |
| Purity |
≥ 99% |
| Molecular Weight |
348.36 |
| Absorption Range |
380–420 nm |
| Function |
Type I free radical photoinitiator |
| Application |
UV coatings / UV inks / UV adhesives |
| Storage Condition |
Cool, dry, avoid light exposure |