Physical and Chemical Properties:technical grade:white solid,special gravity:1.4113(20ºC),melting point: 169-172ºC, steam pressure: less than 992.2*10-5Pa(110ºC),at 20ºC solubility in water:0.4g/l(pH5), 120g/l(pH6.8),39.2g/l (pH8.8), acetone:18.0g/l, acetonitrile:23.0g/l,chloroform,dimethyl formamide:64.0g/l, methylene chloride:160g/l,ethanol:4.5g/l,hexane: less than 20mg/L,toluene:70g/l. Original packaging can be stored at normal temperature for over two years.