磷化钙（化学式：Ca₃P₂）是一种化学燃烧弹或作为灭鼠剂使用。外观呈红棕色结晶粉末或灰色块状，熔点1600℃。

磷化钙与酸或水会发生反应，自燃及释放出磷化氢。在潮湿空气中能自燃，与氯、氧、硫、盐酸反应剧烈，会引起燃烧爆炸的危险。

Calcium phosphide (CP, Ca₃P₂) is a chemical used in incendiary bombs. It has the appearance of red-brown crystalline powder or grey lumps, with melting point of 1600 °C. Its trade name is Photophor for the incendiary use or Polytanol for the use as rodenticide.