F.M.:  ZnSO₄  

Specs.:        
Zn                                                                 35% min.
As                                                         0.0005% max.
Pb                                                           0.002% max.
Matter insoluble in water                      0.05% max.
Finess (250um)                                  95% passed 

Packing:      25kg/50kgs per p.p.bag