The formation of yellow fumes from red powder
name: The conversion from one phosphorus allotropic modification to another
Wear eye protection goggles. Vapours of white phosphorus are poisonous! Perform the reaction in a hood or outdoors.
Always follow general safety
recommendations. Please note that conducting chemistry
experiments you must comply with the relevant legal procedures in
There are several allotropic modifications of phosphorus. When heated, the structure of the crystal lattice of red phosphorus is changed. Thus, formation of white phosphorus occurs. The orange color of white phosphorus is caused by red phosphorus impurities.
White phosphorus is much more chemically active and pyrophoric.