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Photoinitiator TPO is a highly efficient free radical (1) type, highly efficient photoinitiator with absorption in the long wavelength range. Because of its wide absorption range, its effective absorption peak of 350 ~ 400nm, has been absorbed to about 420nm, its absorption peak is longer than conventional initiators, by light can generate benzoyl and phosphoryl two radicals, both can trigger polymerization, so the light curing speed, it also has a photobleaching effect, suitable for thick film deep curing and coating does not yellow characteristics, with low volatility, suitable for For water-based.
| Melting point | 88-92 °C(lit.) |
| Boiling point | 519.6±60.0 °C(Predicted) |
| density | 1.12 g/mL at 25 °C(lit.) |
| refractive index | n20/D 1.475(lit.) |
| Fp | >230 °F |
| storage temp. | Sealed in dry,Room Temperature |
| λmax | 400nm(DMF)(lit.) |
| Stability: | Stable. Incompatible with strong oxidizing agents. |
| InChIKey | VFHVQBAGLAREND-UHFFFAOYSA-N |
| CAS DataBase Reference | 75980-60-8(CAS DataBase Reference) |
| EPA Substance Registry System | Phosphine oxide, diphenyl(2,4,6-trimethylbenzoyl)- (75980-60-8) |
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