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Chromic anhydride
Industrial Chromic anhydride: purple flakes
Molecular formula: CrO3
Proportion: 2.7(crystal)
Usage: it is mainly used in chrome plating and producing high purity chromium. It can be used to produce chromium oxide green. It acts as mordant when dying woolen fabric. It is also the raw material in making catalyst. In organic synthesis industry, it is used as catalyst and oxidant.
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Industry technical standards for chromic anhydride |
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Standards of implementation: GB1610—2009 |
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Indicators project |
INDEX |
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Excellent Grade |
First Grade |
Qualified Grade |
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Chromic anhydride(dry), ω/% ≥ |
99.8 |
99.6 |
99.2 |
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Water insoluble ω/% ≤ |
0.01 |
0.03 |
0.05 |
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Sulfate(SO4) ω/% ≤ |
0.05 |
0.1 |
0.2 |
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Sodium(Na) ω/% ≤ |
0.04 |
- |
- |
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Turbidity ≤ |
5 |
15 |
- |
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