H 1604 (OTTO) Hydroxylamine O-sulphonic acid, 96% Cas 2950-43-8 - used in the synthesis of quinolones for the benzodiazepine site of GABAA receptors. H 1604 (OTTO) Hydroxylamine O-sulphonic acid, 96% Cas 2950-43-8 - used as a polymerization catalyst and an amination reagent. It is involved in the preparation of diazene by reacting with an alkali. H 1604 (OTTO) Hydroxylamine O-sulphonic acid, 96% Cas 2950-43-8 - used in the inhibition of polychlorinated dibenzo-p-dioxins (PCDD) as well as (polychlorinated biphenyl) PCB formation in co-combustion.