Calcium phosphide preparation

Calcium phosphide is obtained from simple substances


Получение фосфида кальция

by him74ru


Wear lab gloves and eye protection.

There is a serious fire risk - a fire extinguisher should be ready. Make sure there is nothing flammable nearby.

This experiment must be performed in a well-ventilated room or in a fume hood.

White phosphorus which is produced in the tube is a very poisonous substance!

Always follow general safety recommendations. Please note that conducting chemistry experiments you must comply with the relevant legal procedures in your country.

Reaction formula

3Ca + 2P -[T]→ Ca3P2

Step-by-step instruction

WARNING! This experiment is dangerous! You should NOT perform this at home. ONLY carry out this experiment, if you are a trained chemist, and you understand local safety and legal requirements, which are required to perform such experiments

  1. Put some calcium powder and red phosphorus powder into a heat-resistant glass tube.
  2. Heat it with a burner. Calcium phosphide is formed under heating.

Scientific background

Red phosphorus reacts with alkaline earth metals under heating. In the reaction under consideration calcium phosphide is obtained. During the experiment white smoke of white phosphorus is obtained in the tube. This smoke ignites in contact with air.


Published on 14 July 2015

  • Fire
  • Heating with fire
  • Explosion
  • Poisoned gas
  • Organic
  • Electricity
  • Solution
  • Oxidation reduction
  • Color change
  • Precipitate
  • Gassing
  • Catalyst