Specification:
Items | Grade A | Grade B |
Purity | 99.7%Min | 99.5%Min |
Water insoluble | 0.02%Max | 0.03%Max |
Sulphates | 0.06%Max | 0.15%Max |
Na | 0.05%Max | 0.05%Max |
Chromic acid ( chromium trioxide, CrO3) is an odorless red deliquescent solid. Chromium trioxide is produced commercially by the reaction of sodium dichromate with concentrated sulfuric acid. It has been used mainly for chromium plating particularly in the production of automobiles and as a colorant in ceramics. Uses in other metal-finishing operations include aluminium anodizing, particularly on military aircraft; chemical conversion coatings, which provide both decoration and corrosion protection; and the production of phosphate films on galvanized iron or steel. It is a powerful oxidant and are utilized by controlled oxidations in organic synthesis. This compound is sensitive to moisture.