NILE CHEMICALS

ZINC OXIDE

SPECIFICATION

ZnO    M.W.    81.38  
Minimum Assay   ( by complexometry  
on ignited subtances ) 99%
Maximum Limits Of Impurities :  
Subtances insoluble in acid and carbonate passes test
Free alkali ( as NaOH ) 0.12%
Chloride ( CI ) 0.005%
Sulphate ( SO4 ) 0.02%
Arsenic ( As ) 0.0005%
Lead ( Pb ) 0.005%
Iron ( Fe ) 0.001%
Subtances reducing KMnO4  ( as O ) 0.0008%
Residue on ignition ( 900OC ) 1%
   

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