Notably discovered by Henning Brand in his own urine, for 10 points, identify this element which has red and white allotropes and chemical symbol P.
One atom of this element with three ether linkages reacts with an alkyl bromide in the Arbuzov reaction. In one compound, this element is bonded to an anisole group, double-bonded to a sulfur, and single bonded to two other sulfurs; that compound is called Lawesson's reagent. Its radioactive 32 isotope is used to label DNA hybridization probes for Southern blots, and it appears in namesake di-ester linkages running along the DNA backbone. Notably discovered by Henning Brand in his own urine, for 10 points, identify this element which has red and white allotropes and chemical symbol P.
One atom of this element with three ether linkages reacts with an alkyl bromide in the Arbuzov reaction.
Phosphorus [accept P until mentioned]