INTRODUCTION
Chromium hydroxide, a gelatinous, polymeric inorganic powder, is amphoteric in nature. It reacts as an acid as well as a base. On heating, it decomposes to chromic oxide. The molecule is largely used in cosmetics and tanning industries.
Manufacture
Chromium hydroxide is produced by reaction of chromic chloride with aqueous ammonia.
| Synonym | Chromium trihydroxide Chromic hydroxide |
| CAS no. | 1308-14-1 |
| EINECS no. | 215-158-8 |
| Molecular formula | Cr(OH)3 |
| Molecular weight | 103.01 |
| Structure |  |
Applications
| Cosmetics | Chromium hydroxide is used as a green pigment. In this usage, toxicity of chromium is not regarded as health hazard. |
| Tanning Industry | A major part of the tanning industry use trivalent chromium salts for tanning and the main compound is chromic hydroxide. |
| Catalyst | The oxide is particularly used as a catalyst in chemical processes such as: – Dehydrogenation of alcohols – Hydrogenation of olefins |
| Other uses | – As mordant in textile industries, the lakes formed with this product renders extreme light and washing fastness to the fabric. – A feeble application in proteomic research is also cited. |
SPECIFICATIONS
| Test | Unit | Specification |
|---|---|---|
| Appearance | – | Grey greenish to grey-blue powder |
| Purity | % | 70 – 80 |
STORAGE
The product is stored at ambient temperature.
PACKING
25 kg bag.
REACH Status
Not registered yet.
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