... ,melting point 34.6°C,when heated to 180°C,it may lose crystal water, convert to anhydrous.5,Packing: 25kg net paper ... .0-51.0Lead, ≤%0.00040.0004Water insoluble(Anhydrous basis),≤%0.20.2Fluoride, ≤%0.0050.001Loss on drying,1,Anhydrous:≤5.0%;2,Dihydrate:18.0%-22.0 ... .0%,2,Dihydrate ≤22.0%3,Heptahydrate ≤50.0%4,Dodecahydrate ≤61.0%(40°C,3h then 105°C,5h))As,≤%0.00030.0003Cadmium ≤%--0.0001Mercury ≤%--0 ...