Technical Data Sheet

Description & Application

Sodium Metabisulphite (Na2S2O5) is a food additive can be used as: Bleach agent; Loose agent; Antiseptic and germicide; Inhibitor and freshen agent ;also as a mordant dyeing, fabric antichlor after bleaching, paper fiber bleaching agent, waste water treatment, tanning agent for leather, natural rubber coagulant, building material,etc.


Typical Properties

CAS NUMBER:                    7681-57-4

Chemical product:              Sodium Metabisulphite

Chemical Formula:              Na2S2O5

Molecular Weight:              190.10

Assay as Na2S2O5:                97.0%min.

Iron as Fe:                            20ppm max.

Arsenic as As:                       2ppm max.

Heavy metal as Pb            10ppm max.

Water insoluble:                  0.05%max.

PH (1% solution,25):       4.0 4.6

Appearance:                       White or slight yellowish crystalline powder



Sodium Metabisulphite is supplied in 25kgs net kraft paper / plastic woven bag. Or in 550/600/1,100/1,200kgs jumbo bag.

User Exposure: Do not breathe dust. Avoid contact with eyes, skin, and clothing. Avoid prolonged or repeated exposure.


Suitable: Keep tightly closed.

Special requirements
Air and moisture sensitive