1. Zinc Borate 2335 2. High Quality 3. Competitive price 4. A reliable supplier Specification Product standard Q/ZWW003-2003 Item/GradeZinc borate 2335( 2ZnO.B2O3 3.5H2O)Excellent gradeFirst gradeWhiteness9995Surface water % ≤0.51.0Particle size, um3-53-5ZnO, %37.0-40.0B2O3 , %45.0-48.0Loss on ignition,%13.5-15.5Fineness (Residue on 45um sieve ), % ≤0.1Specific gravity, g/cm32.67Melting pointoC; ...