Application Widely used in chromium plating, wood preservation, medicine, catalyst, pigment, oxidizing agent, glass coloring and mordant of textile etc. Also used as a material producing oxidative catalyst. Assay(CrO3) 99.8%min Water insoluble matter 0.02%max Sulfate(SO4) 0.06%max Sodium (Na) 0.05%max Chloride(Cl) 0.005%max