Hydroxylamine sulfate is widely used in the synthesis of pharmaceuticals, particularly in the production of oximes, which are intermediates for various drugs. It serves as a reducing agent in organic synthesis, facilitating the conversion of nitro compounds to amines. In the photographic industry, it is employed as a stabilizer for color developers. Additionally, it is utilized in the production of herbicides and pesticides, where it acts as a key intermediate. In analytical chemistry, it is used for the detection and quantification of aldehydes and ketones. Its role in polymer manufacturing includes acting as a chain terminator to control molecular weight.