tem : Copper sulphate crystals 
Purity  CuSO4.5H2O     : 98%  
Copper (%)                      : 24.7%  
 Iron and aluminium    : 0.3% ( Max)
Insoluble in water            : 0.2% (Max)
pH value                             : 3.0 to 3.5  
Appearance                    : blue crystal 
Physical form                  : Crystals