What Is Sodium Chromate?
Sodium Chromate, an inorganic compound with the formula Na2CrO4, is known for its CAS No. 7775-11-3. A yellow crystalline solid, it exhibits hygroscopic properties and forms multiple hydrates. Highly soluble in water, it’s used in various industrial applications.
Uses of Sodium Chromate
Applications range from the manufacture of paints and inks to wood preservatives in the petroleum industry. In medicine, it assists in red blood cell volume measurement. Its strong oxidizing power also makes it valuable in synthesizing chromium compounds.
Properties of Sodium Chromate
1. Synthesis
Synthesized from potassium dichromate and sodium hydroxide, or via a reaction involving chromium(III) oxide and sodium carbonate in oxygen presence.
2. Chemical Properties
Characterized by its reaction in acidic solutions and its transformation into various chromate ions. Nonflammable, it doesn’t burn by itself.
3. Regulatory Information
As a hexavalent chromium compound, it’s subject to stringent environmental and health regulations.
Types of Sodium Chromate
Marketed mainly for research, and available in various capacities, it requires careful handling due to its toxic nature.