Calcium phosphide

Calcium Phosphide

Calcium phosphide is an inorganic compound with the chemical formula Ca₃P₂. It is a red-brown crystalline solid that is used in various applications, including as a rodenticide and in the production of fireworks. Calcium phosphide is known for its ability to release phosphine gas when it comes into contact with water, making it a useful chemical in certain industrial processes.

Chemical Properties

Calcium phosphide is composed of calcium and phosphorus, with the chemical formula Ca₃P₂. It is a salt-like compound that is typically red-brown in color. The compound is stable under normal conditions but reacts vigorously with water to produce phosphine gas (PH₃) and calcium hydroxide (Ca(OH)₂):

Ca₃P₂ + 6 H₂O → 3 Ca(OH)₂ + 2 PH₃

Phosphine is a toxic and flammable gas, which is why calcium phosphide must be handled with care.

Uses

Calcium phosphide has several applications:

• Rodenticide: It is used as a rodenticide due to its ability to release phosphine gas, which is toxic to rodents.
• Fireworks: In the fireworks industry, calcium phosphide is used to create smoke and special effects.
• Signal Flares: It is used in maritime signal flares due to its ability to produce bright light and smoke when ignited.

Safety and Handling

Calcium phosphide is a hazardous material and should be handled with caution. It should be stored in a dry environment to prevent accidental contact with water. Proper protective equipment, such as gloves and goggles, should be worn when handling the compound.

Also see

• Phosphine
• Calcium compounds
• Rodenticides
• Fireworks