Ammonium Persulfate is a white, crystalline, odourless salt with a density of 1.98 g/cc. It is used as an initiator (source of free radicals) for the polymerisation of monomers and as a strong oxidizing agent in many applications.

Sodium Persulfate is a white, crystalline, odourless salt or powder with the density of 2.59 g/cc. It is used as initiator for the Polymerization of monomers and as a strong oxidizing agent in many applications.