... wt: anhydrous 141.96; Formula wt, dihydrate 177.993,CAS: anhydrous [7558-79-4]; CAS: dihydrate [10028-24-7]5,Specificity: Colorless ... ≤%0.0050.001Loss on drying,1,Anhydrous:≤5.0%;2,Dihydrate:18.0%-22.0%. (120°C,4h)1,Anhydrous ≤5 ... .0%,2,Dihydrate ≤22.0%3,Heptahydrate ≤50.0%4,Dodecahydrate ≤61.0 ... 5h))As,≤%0.00030.0003Cadmium ≤%--0.0001Mercury ≤%--0.0001 disodium phosphate