Zinc Borate 3.5 H2O 1)MF: 2ZnO 3B2O3 3.5H2O 2)Purity:ZnO: ... ,paint,china,glaze, antiseptic and pesticide.Zinc Borate as upper-fine flame retardant, its character of smoke abatement is better than ... .0-40.0B2O3 , %48.0-49.0Loss on ignition,%13.5-15.5Fineness (Residue on 45um sieve ), % ≤0.1 Pb % ≤ 0.0005Specific ...