Chromium(VI) oxide
Synonyms: Anidride cromica;anidridecromica;anidridecromica[qr];Chrome bronze;chrome(trioxydede);chrome(trioxydede)(french)[qr];chrometrioxydede;chromia(cro3)
CAS: 1333-82-0
MF: CrO3
MW: 99.99
EINECS: 215-607-8
Melting point 196 °C (dec.)(lit.)
Boiling point 330 °C
density 2.7
Fp 250°C
form macroporous
Water Solubility Highly soluble
FreezingPoint 170~172℃
Sensitive Hygroscopic
Merck 14,2235
Stability: Stable. Strong oxidizer. Reacts with most organic material in a violent and often explosive fashion. Moisture sensitive.
Chemical properties It appears as dark red rhombic crystals or purple-red flakes. Soluble in water, alcohol, sulfuric acid and ether, do not dissolve in acetone.
Uses 1. It is used for electroplating and the manufacturing of high-purity metal chromium, dyes, synthetic rubber and refined oil, and so on
2. Chromium(VI) oxide is the main raw material of electroplating chrome. During the electroplating chrome production, chromium content has a large fluctuation within the range of 50 to 500 g/L. It should be mainly controlled of the appropriate temperature and current density. It can be obtained in the smooth plating of the bright coating. Its solution can also be used for zinc coating passive film, to improve the protection performance.
3. It is mainly used for electroplating industry as the raw materials of electroplating chromium used in making bicycles, sewing machines, watches, meters, flashlights and household hardware as well as for the production of high-purity metal chromium. It is the raw materials for the manufacture of chromium oxide green and zinc chrome yellow; is also the raw materials for the production of low-temperature shift catalyst, high-temperature shift catalyst and high-pressure methanol synthesis catalyst. It can be used as mordant in wool fabric dyeing; as oxidant in printing and dyeing industry; also used for wood preservative.
4. The solution is used for chrome plating
5. It is used as analytical reagent and strong oxidant, also used in the manufacture of chromate
6. It is strong oxidizing agent; for determination of carbon and phosphorus; the purification of oil and ethylene; manufacturing of chromium salt.
7. Oxidants, glass coloring, raw materials for the manufacturing of oxidation catalyst.