Hydroxylamine hydrochloride hydron; hydroxylamine; chloride azinous acid hydrochloride azinous acid; hydron; chloride 5470-11-1 159417_SIAL 379921_ALDRICH 255580_SIAL EU-0100637 55460_FLUKA 431362_ALDRICH C11598 Hydroxylammonium chloride 55459_FLUKA