Chemistry and Chemical Disasters. A violet-red powder which is an allotropic form of the element phosphorus and which ignites in air at 5000F; in large quantities it ignites spontaneously and on exposure to oxidizing materials
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}