Sodium Metabisulfite

Brief introduction

  Sodium metabisulfite is a white or yellow crystalline powder or small crystal, with a strong SO2 odor, the aqueous solution is acidic, and the contact with strong acid releases SO2 and generates the corresponding salts, and when it is placed in the air for a long time, it is oxidized to Na2S2O6, so the product can not be stored for a long time

Usage

  It is used as a preservative, bleaching agent and loosening agent in food processing. Sodium metabisulfite is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; Sodium metabisulfite is used in the chemical and pharmaceutical industries for the production of insurance powder, sulfadimethylpyrimidine analgin, caprolactam, etc., as well as chloroform, phenylprosulfone and benzene Chemicalbook formaldehyde purification. It is used in the photographic industry as an ingredient for fixers. The fragrance industry is used in the production of vanillin. It is used as a preservative in the brewing industry, a rubber coagulant and a dechlorinator after bleaching cotton cloth. Organic intermediates, dyes, tanning are used as reducing agents for electroplating industry, wastewater treatment in oil fields, and as beneficiation agents for mines, etc.

Chemical properties 

melting point :>300°C(lit.)                           Density:1.48

Storage conditions:Storeat+5°Cto+30°       Solubility:540g/L(20°C)

Morphology:Powder/Solid                           Color:Whitetoslightlyyellow

Odor:Sulphorous                                          Acid-base indicator discoloration pH range:4.5at50g/lat20°C

PH value:3.5-5(50g/l,H2O,20℃)                   Water solubility:540g/L(20ºC)