can't read?
Hydroxylammonium sulphate, (NH3OH)2SO4, is the sulfuric acid salt of hydroxylamine. It is primarily used as an easily handled form of hydroxylamine, which is explosive when pure.
H 1617 (OTTO) Hydroxylamine sulphate, GR 99%+ Cas 10039-54-0 - used to generate hydroxylamine-O-sulfonic acid from oleum or chlorosulfuric acid.