White Phosphorus is the most reactive while black P is the least reactive. The reactivity decreases in the order
white P> Red P > Black P
Stability will be just opposite to the above order
|Property||White phosphorus||Red phosphorus||Black phosphorus|
|State||Waxy solid||Brittle powder||Cristalline with greasy|
|Melting point||317K||Doesn’t melt||860K|
In addition to this violet phosphorus also present,which is not a significant allotrope.