Widely used in chromium plating, wood preservation, medicine, catalyst, pigment, oxidizing agent, glass coloring, and mordant.. 1.Specificaiton ITEMGB/T1610-2009 INDEXSTANDARDPREMIUM GRADEFIRST GRADESTANDARD GRADEELECTROPLATING LEVEL HIGH GRADECrO3≥99.80%≥99.60%≥99.20%≥99.85%SO42-≤0.05%≤0.10%≤0.20%≤0.05%INSOLUBLE≤0.01%≤0.03%≤0.05%≤0.01%Na+≤0.04%—— ——≤0.04%TURBIDITY NTU≤5.05≤15——≤5Cl-——————≤0.06%2 ...