First, the basic chemical information
1, Product name: photoinitiator 819 
2, Chinese name: phenyl bis (2,4,6-trimethylbenzoyl) phosphine oxide 
3, English name: Phenylbis (2, 4, 6-trimethylbenzoyl) phosphine oxide 
4, Molecular formula: C₂₆H₂₇O₃P 
5, Molecular weight: 418.46 
6, CAS number: 162881-26-7 

Second, physical and chemical parameters 
1, Appearance : yellow powder 
2, Density: 1.19 g / cm³
3, Melting point: 127 ~ 131.5 ° C 
4, Boiling point: ≥ 168 ° C 
5, Content: ≥ 98% (liquid chromatography) 
6, Vapor pressure: 5 × 10-10 kPa (25 ° C)    
7, UV absorption peak: 295 , 370nm 
8, Uses: for UV curing varnish and paint system, such as wood, paper, metal, plastic, optical fiber and printing inks and prepreg systems. 
9, packaging: 20KG cardboard drum or box