SODIUM METABISULPHITE

• Category :

  Inorganic chemicals

• Synonyms :

  Sodium pyrosulfite;disodium disulphite;Sodium metabisulphite;Sodium disulphite;Sodium pyrosulphite;SODIUM DISULFITE;disodium oxidosulfanesulfonate oxide;Sodium Metabi;Metabisulfite Sodium;Sodium Metabisulfite (Food Grade);

• CAS NO :

  7681-57-4

• EC NO :

  231-673-0

• Molecular Formula :

  Na₂S₂O₅

• Molecular Weight :

  190.1065

• Main Specifications :

• InChI :

  InChI=1/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2

• Product description :

  Molecular Formula:Na₂S₂O₅
  Molecule Weight:126.04
  Appearance: white or light yellow crystalline powder

  Specifications
  Food Grade:
  Quality standard: GB1894-2005

  Item	Value
  sodium sulfite (Na2SO3), mass fraction/%	≥ 97.0
  Fe, mass fraction/%	≤ 0.01
  Free alkali(as Na2SO3), mass fraction/%	≤ 0.60
  Heavy metals(as Pb), mass fraction/%	≤ 0.001
  As (As), mass fraction/%	≤ 0.0002
  Clarity	Passed

  Specifications
  Tech Grade:
  Quality standard: HG/T 2967-2000

  Item	Value
  	Top-grade	First grade	Qualified product
  sodium sulfite (Na2SO3),%	≥ 97.0	≥ 96.0	≥ 93.0
  Fe,%	≤ 0.003	≤ 0.005	≤ 0.02
  water-Insoluble ,% water-Insoluble ,%	≤ 0.02	≤ 0.03	≤ 0.05
  Free alkali(as Na2SO3),%	≤ 0.10	≤ 0.40	≤ 0.80
  Sulfate(as Na2SO4),%	≤ 2.5	—	—
  Chloride(as NaCl),%	≤ 0.10	—	—

  Uses:dechlorinating agent, bleaching agent, developer,
  reductant, stabilizer, or used in papermaking, electronic and water treatment industry.
  Packing:inpolythene plastic bag with a polypropylene overbag, paper-plastic composite bag, kraft bag, etc.
  Net weight:25,50,1000kilograms per bag or following your demand

• Molecular Structure :