Sodium Metabisulphite 97-100.5% BP Ph.Eur, USP, E223 Food Grade



Sodium metabisulfite or sodium pyrosulfite is an inorganic compound of chemical formula Na2S2O5. The substance is sometimes referred to asdisodium (metabisulfite). It is used as a disinfectant, antioxidant and preservative agent.

  • Disinfectant
  • Antioxidant
  • Preservative Agent
  • Photography
  • Removal of Tree Stumps

Minimum Assay: >95% (as Na2S2O5)
Assay as SO2: >64%
Molecular Formula: Na2O5S2
Molecular Weight: 190.10
Melting Point: >300 deg C
pH (10% Sol): 4.0- 5.5
Arsenic (As): <3mg/Kg
Iron (Fe): <30mg/Kg
Mercury (Hg): <1mg/Kg
Lead (Pb): <5mg/Kg
Selenium (Se): <6mg/Kg
Heavy Metals (as Pb): <10mg/Kg

Certified Food Grade
Conforms to Commission Directive 2008/84/EC (E223)

Hazard Phrases: Causes serious eye damage. Harmful if swallowed. Contact with acids liberates toxic gas.

Prec Phrases: Wear protective gloves/protective clothing/eye protection/face protection.


Cas No: 7681-57-4
Einecs No: 231-673-0


HS CODE: 2832100000


Following the UK’s departure from the EU on 1 January 2021, all European shipments are sent on a DAP Basis (Delivered at Place).

This means that the buyer will be liable for import VAT at their prevailing national rate and for orders over 150€ (including carriage) import duties will become chargeable at your prevailing national rate.

The Duty is ascertained by your national customs authority based on the HS Code of each product. The HS Code is shown in the “European Shipment” section of each product page.


Additional information

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250gm, 500gm, 1Kg, 2Kg, 5Kg, 10Kg, 25Kg