... 280 °C, decompoed in 500 °C . relative density 1.975 . melting point 100 °C. SPECIFICATIONSAppearancewhite or slight ... 30ppm maxHg 1ppm max Usage1 , emetic, supplement, displacement agent 2 , zinc supplement and pesticide; 3 , industrial material ... ; mordant agent of printing and dyeing, preserv agent;water treatment agent; mineral separation agent Package25kg pp woven bag with ...