Zinc Sulphate Heptahydrate 21%
1. Total Zinc Content: 21%
2. High Purity
3. Low Heavy Metal Level

 Zinc Sulphate Heptahydrate21%

A.Total zinc content percent by weight min. ...................................21%

B. Water soluble zinc as percentage of total zinc min......................95.0%

C. Sulphur (as SO4-S) content percentage by weight min................10.5%  

D. Moisture content (free water) percent by weight max....................2.0%  

E. Physical condition: white crystalloid

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Heavy Metal Content

A. Arsenic: 3 ppm max.           B. Cadmium:   7 ppm max.

C. Lead: 8 ppm max.               D.  Mercury:  5 ppm max.     E.  Nickel: 50 ppm max.

Note:Do not contain toxic wastes and the level of heavy metals persent is not hazardous for

        human health, crop and environment.