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Contact SupplierZinc sulphate heptahydrate. It is in a form of white crystals .
Components contents
znso4.7h2o 99 %
zinc (zn) 21 %
lead (pb) 0.003 %
copper (cu) 0.1 %
magnesium (mg) 0.5 %
ph > 4.0
pathogens nil
sulphur (s) 10 %
heavy metals fco complaint
colour white
state white crystals