Chemical Additives

​Photoinitiator TPO (2,4,6-Trimethylbenzoyl)diphenylphosphine Oxide

CAS No.: 75980-60-8
Appearance: Yellow powder.

​Specifications

• ​Purity: ≥99.0% (Tested: 99.62%)
• ​Moisture: 0.14%
• ​Loss on Drying: 0.35%
• ​Density: 1.12 g/mL at 25 °C
• ​UV Absorbance (260 nm): 0.03

​Applications

• ​UV-Curable Inks & Coatings:
  • ​Screen printing inks, ​lithographic/flexographic inks, ​wood coatings.
  • Effective curing on ​white or high-titanium dioxide pigmented surfaces.
• ​Industrial Use:
  • Widely applied in coatings due to ​excellent UV absorption and curing efficiency.

​Packaging & Transportation

• ​Standard Packaging: 1 kg/bag; 25 kg/cardboard drum.
• ​Custom Packaging: Available per buyer’s request.

​Storage

• Store in a ​dry, ventilated warehouse.
• Protect from ​sunlight, ​moisture, and ​open flames.

Summary:
Photoinitiator TPO’s ​high reactivity and ​broad compatibility make it ideal for UV-curable inks and coatings, especially in pigmented systems. Its ​low moisture and ​thermal stability ensure reliable performance, while strict ​storage protocols mitigate degradation risks.