Appearance: white or slight yellow crystal or powder

Item	Index
	I			II
	Excellent Grade	First Grade	Qualified Grade	Excellent Grade	First Grade	Qualified Grade
Zn % ZnSO4.H2O or ZnSO4.7H2O %	35.7 98.0	35.34 97.0	34.61 95.0	22.51 99.0	22.06 97.0	20.92 92.0
Insoluble substance %	0.020	0.050	0.10	0.020	0.050	0.10
PH(50g/L solution)	4.0	4.0	-	3.0	3.0	-
Chloride (Cl) %	0.20	0.60	-	0.20	0.60	-
Pb %	0.002	0.007	0.010	0.002	0.010	0.010
Fe %	0.008	0.020	0.060	0.005	0.020	0.060
Mn %	0.01	0.03	0.05	0.01	0.10	-
Cd %	0.002	0.007	0.010	0.002	0.010	-
Cu %	0.001	-	-	0.002	-	-

Property: white powder or needle crystal, easy soluble in water and insoluble in alcohol and ketone, gradual weathering in air.

Usage: mainly used to produce synthetic fibre, electrolysis, electroplating, organic pigment, feed, pesticide, fertilizer, etc.