We offer Ammonium nickel sulphate ar di-ammonium nickel (ii) sulphate 6 hydrate (nh4)2so4.niso4.6h2o m.w. 394.97 minimum assay 99.0% maximum limits of impurities : insoluble matter 0.003% reaction not less than ph 4.0 chloride(cl) 0.001 % cadmium(cd) 0.001% calcium(ca) 0.005% cobmore...