DICHROMATE
- Empirical Formula: Cr2O7-2
- Molecular Weight: 215.988
- MDL number: MFCD01093393
- Update Date: 2023-04-23 13:52:06
What is DICHROMATE?
Industrial uses
This is an orange, crystalline substance with a specific gravity of 2.68. Solubility in water is
11.7% at 20 °C. Both potassium and sodium dichromate are used in mineral processing.Dichromate solutions have an acid reaction because Cr2O72- ion reacts with water as follows:
H2O + Cr2O72- ? HCr2O4- + H+ + CrO4-
Salts of chromic acid in acid medium are oxidants (Cr4- changes to Cr3- ). In principle,
dichromates are used in selective separation of copper–lead bulk concentrates, usually in
acid pH. A mixture of sodium dichromate and sodium silicate has shown to be an excellent
lead depressant during copper flotation from a bulk copper–lead concentrate containing
secondary copper minerals.
Properties of DICHROMATE
| form | Liquid |
| Exposure limits | ACGIH: TWA 0.0002 mg/m3; STEL 0.0005 mg/m3 (Skin) OSHA: Ceiling 0.1 mg/m3 NIOSH: IDLH 15 mg/m3; TWA 0.0002 mg/m3 |
Safety information for DICHROMATE
Computed Descriptors for DICHROMATE
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