Thioxanthone

Thioxanthone is a type II photoinitiator. The high molar absorptivity of thioxanthone in the near-UV spectral region makes this chromophore attractive as a photoinitiator for free-radical polymerization. Thioxanthone-based photoinitiators show some of the best light absorption properties in the near-UV spectral region and are therefore widely used. Spectral data: Absorption maximum = 380nm. Also used as building block and intermediate for synthesis. Product References: (1) F. Karasu, et al., J. Org. Chem. 78, 9161 (2013) , (2) N. Karaca, et al., Photopolymerisation Initiating Systems Chapter 1 (2018) Appearance: Yellow solid. Solubility: Soluble in chloroform. Identity: Determined by 1H-NMR. InChi Key: YRHRIQCWCFGUEQ-UHFFFAOYSA-N Smiles: O=C1C2=C(C=CC=C2)SC3=CC=CC=C31