Special Provision: IB

Phosphorus oxybromide

Phosphorus oxybromide, molten

Phosphorus heptasulfide, free from yellow or white phosphorous

Phosphoric acid, solid

Phosphorous acid

Phosphorus, amorphous

9-Phosphabicyclononanes or Cyclooctadiene phosphines

Phosphoric acid solution

Phenylmercuric hydroxide

Phenylmercuric nitrate