2-Hydroxy-thioxanthone (TX1)was prepared with thiosalicylic acid and phenol as reactants and concentrated sulfuric acid as catalyst
which was converted to 2-hydroxy-3-(9-oxo-9H-thiox-anthen-2-yloxy)-propyl-trimethyl-ammonium chloride (TX2).The influence of feed ratio
temperature and pH value on the yield of products was discussed.The structure of products was proved by means of FTIR
NMR and elemental analysis.The water-solubility and photo-sensitivity of prepared TX1 and TX2 were investigated by comparing with the commercial photoinitiator Iragcure184D(α-hydroxyketone photoinitiator).