... formula: NH4HSO33, Molecular weight: 99.104, Properties: light yellow liquid, has slight sulphur dioxide smell. Relative density (70%): 1.4 ... dioxide.5, Quality standard:ItemPhoto gradeAppearance clear, light yellow Liquid Assay ,w/w 68-72%PH( Tech 20°C) ... Uses: May use in the dye intermediate synthesis, surfactant,pesticide weed killer and the reducing agent in the pharmaceutical industry. May use ...