1. Excellent quality with competitive prices 2. Good package and prompt delivery 3. We have passed ISO9001 Specification Test ItemResultpurity99.5% minmoisture0.7% maxiron0.7% maxheavy metal(as Pb)0.0005% maxSulphate(as SO4)0.05% maxpH4.0-5.8residue on ignition0.4% max Application It is mainly used for making dry cell and storage battery, dyeing aid, electroplating bath additive and analytical ...