• Sodium metabisulfite
• Sodium disulphite / Sodium disulfite
• Sodium pyrosulphite / Sodium pyrosulfite
  

This product is available in three grades:

• Photo
• Food
• Technical
  

Molecular weight: 190.12

Appearance: White free flowing crystalline powder

Odour: Slight odour of sulphur dioxide

CAS No: 7681- 57- 4

Food

• As a preservative in fruits and starch.
• Enzyme inhibitor in melanin formation (black and brown spots)
  

Treatment of waste water
As an antichlor and in the detoxification of cyanide and chromate

Chemical and pharmaceutical

• Purifying and isolating aldehydes and ketones
• Destroying waste bromine.
  

Textile
Bleaching wool and jute

Leather
Solubilising tanning extracts

Paper and pulp

• Bleaching ground wood
• Antichlor

Photography and film
For developer solutions and acidifying fixing baths

• 25 kg polypropylene woven/ paper bags with heat-sealed HDPE inner
• 25 kg HDPE bags
• 500 kg, 1000 kg, 1100 kg bulk sacks