Sodium nitrate is used in azodyestuff bleaching agent, metal heat treatment auxiliary agent, and in pharmaceutical industry Sodium NitrateMolecular formula:NaNO3Molecular weight : 84. ... property.Uses: it ismostly used in manufacturing nitro-compound, Potassium nitrate , azodyestuff, dye mordant in textile coloration, bleaching agent, metalheat ... ): 0.1% Max.Iron (As Fe): 0.005% Max. Sodium nitrate