Sodium Sulfite Anhydrous

EP, USP (Tested for Endotoxin & Microbes)

CAS #:


Molecular Formula:



Disodium Sulfite, Sulfurous acid, sodium salt (2:1)

Molecular Weight:

126.04 g/mol


Sodium Sulfite anhydrous is a widely used preservative. It is a used for preserving meat and prevent discoloration of dried fruit. It is a soluble sodium salt of sulfuric acid. It is also used in the paper processing industry and to purify TNT. It is also used as a preservative in pharmaceutical preparations.

Characters Unit Specification
Appearance white or almost white powder
Identification complies
Assay % 95,0-100,5
Appearance of solution clear and colourless
Thiosulphates % max. 0,1
Iron ppm max.10
Selenium ppm max. 10
Zinc ppm max. 25
Heavy metals ppm max.10
Total aerobic microbial count cfu/g <10
Total yeasts and moulds count cfu/g <10
E.coli cfu/g absent in 1g
Pseudomonas aeruginosa cfu/g absent in 1g
Staphylococcus aureus cfu/g absent in 1g
Salmonella cfu/g absent in 25g
Bacterial endotoxin IU/g < 2,5
Color and clarity of solution clear and colourless

Shelf Life/Retest Date: Expected shelf life with minimal degradation (less than 1% activity) is one year when stored in a cool, dry location. Actual shelf life may be longer.

Storage/Shipping Conditions:

  • Store container in a well-ventilated position.
  • Store in cool, dry conditions in well-sealed containers.
  • Protect from humidity and keep away from water.
  • Avoid contact with air / oxygen

Pack Sizes: 5 Kg

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