... white granular or crystalline powder1,Formula: Na2HPO4; Na2HPO4·nH2O (n = 2,7 or 12)2,Formula wt: anhydrous 141.96; Formula wt, dihydrate ... .2Fluoride, ≤%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 ...