White phosphorus is the most reactive form of phosphorus. It is a waxy, white solid that is highly flammable and explosive. It is also very toxic and can cause severe burns. White phosphorus is used in
matches, fireworks, and incendiary devices.Black phosphorus is a non-metallic, black solid that is less reactive than white phosphorus. It is used in semiconductors and solar cells.
Violet phosphorus is a rare, purple form of phosphorus that is even less reactive than black phosphorus. It is used in research and has no commercial applications.
Red phosphorus is a red, amorphous form of phosphorus that is less reactive than white phosphorus but more reactive than black phosphorus. It is used in matches, fireworks, and pesticides.