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40115 Sodium metabisulfite, ACS, 97% min

CAS Number
Sodium pyrosulfite
Sodium sulfite

Stock No. Size Price ($) Quantity Availability
40115-36 500g 31.60
40115-A4 2.5kg 110.00
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Sodium metabisulfite, ACS, 97% min


Chemical Properties

Formula Weight
Crystalline powder
Melting point
Storage & Sensitivity
Moisture Sensitive. Air Sensitive. Store under Nitrogen. Ambient temperatures.
Soluble in water, ethanol and glycerol.

Grade Specifications

Maximum level of impurities: Insoluble matter 0.005%, Cl 0.05%, Heavy Metals (as Pb) 0.001%, Fe 0.002%, S2O3 0.05%


Sodium metabisulfite is used as an active ingredient in campden tablets, as a cleaning agent for potable water reverse osmosis membranes, as a preservative and an antioxidant in food. It also acts as a corrosion inhibitor in oil and gas industry, as a bleaching agent in the production of coconut cream, as the source of sulfur dioxide and in the destruction of cyanide in commercial gold cyanidation processes. It is utilized in the precipitation of gold from auric acid as well as in the waste water treatment to remove hexavaent chromium as trivalent chromium by precipitation after reduction. Further, it is used in photography. In addition, it plays as an oxygen scavenger to eliminate the dissolved oxygen in wastewater and in pipes.


Moisture and air sensitive. Incompatible with strong oxidizing agents and strong acids.

Literature References

Tan, T. C.; Cheng, L. H.; Bhat, R.; Rusul, G.; Easa, A. M. Effectiveness of ascorbic acid and sodium metabisulfite as anti-browning agent and antioxidant on green coconut water (Cocos nucifera) subjected to elevated thermal processing. Int. Food Res. J. 2015, 22 (2), 631-637

Zaid, B.; Maddache, N.; Saidi, D.; Souami, N.; Bacha, N.; Ahmed, A. S. Electrochemical evaluation of sodium metabisulfite as environmentally friendly inhibitor for corrosion of aluminum alloy 6061 in a chloride solution. J. Alloys Compd. 2015, 629, 188-196.

GHS Hazard and Precautionary Statements

Hazard Statements: H302-H318

Harmful if swallowed. Causes serious eye damage.

Precautionary Statements: P260-P264b-P270-P280-P301+P312-P305+P351+P338-P310-P314-P330-P501c

Do not breathe dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Do not eat, drink or smoke when using this product. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician. Get medical advice/attention if you feel unwell. Rinse mouth. Dispose of contents/ container to an approved waste disposal plant

Other References

Harmonized Tariff Code


  • 11602

    Potassium iodate, ACS, 99.4-100.4%
  • 12314

    Sodium chloride, ACS, 99.0% min
  • 14518

    Sodium thiosulfate pentahydrate, ACS, 99.5-101.0%
  • 33273

    Sulfuric acid, ACS, 95.0-98.0%
  • 36428

    Urea, ACS, 99.0-100.5%

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