... tannage,plant bleaching agent,reductant,etc Sodium Sulfite Anhydrous ,food grade Formula: Na2SO3 Molecule Weight: 126.04 Appearance: white or light ... Pb) %0.001maxAS %0.0002maxClarity Passed Test Sodium Sulfite Anhydrous ,Industrial gradeFormula: Na2SO3Molecule Weight: 126.04Appearance: white or light yellow crystalline ...