Sodium dichromate

Sodium Dichromate

Structural formula of sodium dichromate

Sodium dichromate is an inorganic compound with the formula Na_Cr_O_. It is a common source of the dichromate anion, Cr_O___, and is a powerful oxidizing agent. Sodium dichromate is a red-orange crystalline solid that is highly soluble in water.

Chemical Properties

Sodium dichromate is a strong oxidizing agent and is used in various industrial processes. It is often used in the production of chromium compounds and as a corrosion inhibitor. The compound is also used in the manufacture of pigments, in metal finishing, and as a mordant in dyeing.

Reactions

Sodium dichromate reacts with reducing agents to produce chromium(III) compounds. It can also react with acids to produce chromic acid, which is used in cleaning glassware and etching materials.

Production

Sodium dichromate is produced by the reaction of chromite ore with sodium carbonate and air. The process involves roasting the ore in the presence of sodium carbonate, which converts the chromium to sodium chromate. This is then acidified to produce sodium dichromate.

Applications

Sodium dichromate is used in a variety of applications due to its oxidizing properties. It is used in the production of leather, in the manufacture of ceramics, and in the synthesis of organic compounds.

Safety and Handling

Sodium dichromate crystals

Sodium dichromate is highly toxic and carcinogenic. It poses significant health risks if inhaled or ingested, and it can cause severe skin burns. Proper safety precautions, including the use of personal protective equipment, are essential when handling this compound.

Environmental Impact

Sodium dichromate is a significant environmental pollutant. It is highly toxic to aquatic life and can cause long-term adverse effects in the aquatic environment. Efforts to reduce the use of sodium dichromate in industrial processes are ongoing, with a focus on finding safer alternatives.

Related Pages

• Chromium
• Chromic acid
• Oxidizing agent
• Pigment