The normal phase of phosphorus at room temperature is that of a solid. Phosphorus is a nonmetallic chemical that has an atomic number of 15 and the chemical symbol P on the periodic table. While its melting point is 317.3 degrees Kelvin, its boiling point is 553.7 degrees Kelvin.
Hennig Brand discovered phosphorus in 1669 by isolating it from urine. Although elemental phosphorus does not exist naturally, it is obtained for commercial use from phosphate rock.
White, red and black phosphorus are the three allotropes of this chemical. White phosphorus is reactive and toxic, but red phosphorus is nontoxic. Red phosphorus is used to make safety matches, and various phosphate compounds are utilized for manufacturing fertilizers, cleaning products and fluorescent light bulbs.