used in medicine, papermaking, tannage, leather, printing, dyeing, bleaching and food made in china Product name: Sodium Sulfite AnhydrousMolecular formula : Na2SO3Appearance : white crystalline powderspec: Na2SO3 98.5%minIron (as Fe) 5ppmmaxWater Insolution 0.01%maxFree alkali(as Na2CO3)0.003%maxChloride (as NaCl) 0.01%max high quality sodium sulphite, industrial grade