Properies: Not soluble in water, soluble in alcohol, ether aether and benzene; toxic and shall be stored avoiding light.Specifications No. Items index 1 appearance white crystalline powder 2 assay %í² 99.0 3 free acid(ost-so3h) %ín 0.2 4 o-toluenesulfonyl chloride (otsc) %ín 0.2 5 moisture %ín 0.1 6 melting pointocí² 67 7 color(apha)ín 30 Packing: Deep-colored plastic drum, plastic-lined, 25kg/50kg/150kg net.