ZnO M.W. 81.38
ASSAY ....................... min 99.5%
CHLORIDE(Cl) ................ max 0.001%
IRON(Fe) .................... max 0.0003%
HEAVY METALS(Pb) ............ max 0.005%
LOSS ON IGNITION ............ max 0.5%
CARBONATE(CO3) .............. max 0.25%
NITROGEN COMPOUNDS(N) ....... max 0.0005%
SODIUM(Na) .................. max 0.001%
REDUCING SUBSTANCES(O) ...... max 0.0016%