logo-img
  • Call

    +91 265 298 57 33
    +91 265 298 67 33

  • Email

    chemicals@raybonchemicals.com

Sodium Metabisulfite

Sodium Metabisulfite is a strong reducing agent in aqueous solution. It binds the oxygen dissolved in water, it is used to remove FRC free residual chlorine in RO feed water to protect the membranes from oxidation.

Appearance: White or slightly Yellowish, fine crystalline powder, with an odour of SO2

Chemical Name: Sodium Metabisulfite, Na2S2O5

CAS No.: 7681-57-4

Bulk Density: 1 -1.2 kg/l

Water soluble

Parameter Unit Specification
Na2S2O5 g/100 g min 97.2
SO2 g/100 g min 65.5
pH value (5 % solution) - 4.0 – 4.8
NaCl mg/kg max. 50
Heavy metals as Pb mg/kg max. 10
Fe mg/kg max. 10
Properties:

Sodium Metabisulfite ( SMBS) is available in the form of a fine microcrystalline powder , it has a slight odour of sulphur dioxide.

With exposure to air , Sodium bisulfite solutions undergo oxidation

Sodium metabisulfite is a strong reducing agent in aqueous solution. It binds the oxygen dissolved in water and must therefore not be discharged untreated into rivers and lakes, because it may seriously disrupt animal and plant life.

Applications:
  • In Reverse Osmosis Systems. It is commonly used for removal of free chlorine and as a biostatic. It reduce biological growth and keep membrane performance characteristics during long term storage, shipping or system shut downs.
  • In the chemical and pharmaceutical industries for various purposes, e. g. As a reducing agent.
  • In drinking water treatment to remove excess chlorine.
  • In special cases to remove oxygen from boiler feed water.
  • In wastewater and sewage treatment
  • In aqueous solution they are in the form of sodium Bisulfite, i.e. in the same form as in our product Sodium Bisulfite Solution 38 – 40%. However, the solution prepared in this way is of higher purity, clear, slightly yellowish liquids with a strong odour of Sulphur dioxide, and pH values between 3.9 and 4.4.