Strong water soluble white crystalline oxidizer (oxygen @ 47.35%) used in hundreds of applications including but not limited to; safer alternative to zinc chloride solutions for soldering flux, copper and zinc etchant (dissolve 1 kg in 4 liters water and store in a ventilated glass or plastic container); electroplating; bleaching & whitening applications; initiator for emulsion polymerization; photography; manufacture of aniline dyes and dying; experimantal oxidizer in pyrotechnics and explosives, etc.. Completely soluble in water. No ATFE required to purchase - no quantity restrictions.