Sodium Metabisulfite

Product Description

Sodium Metabisulfite:

Appearance: White or light yellow crystalline power;
Molecular Formula: Na2S2O5
CAS No.: 7681-57-4
Place of Origin: Hebei, China(Mainland)

Spec:

Item Specification
Food Grade Tech Grade
Appearance White or Slightly Yellow Crystalline Powder
Content 97.0% Min 97.0% Min
SO2 65.0% Min 65.0% Min
Na2S2O4 2.0% Max 2.0% Max
Insolubles In Water 0.05% Max 0.05% Max
Particle Size 85% (Mesh 200) 85% (Mesh 200)
pH 4.5 -5.5 4 -4.6
Fe 5ppm max 5ppm max
Heavy Metal 10 ppm max
As 1 ppm max

Main Uses:

Textile-printing and dyeing: As Mordant of printing and dyeing; Dechlorinate textile after beaching; As agent for textile's boiling-off; As Sulphonated agent and reducer.
Pharmacy: Used to manufacture colorform\solasulfone\benzaldehyde etc; As Sulphonated agent and reducer.
Tanning: Used for treatment of leather to soften the surface and make the leather waterproof\more tough\antiwear.
Sensitization industry: Is served as the developing agent reductant and the protection of fixing bath dose and so on.
Food industry: It is used as bleacher\antiseptic\leavening agent\antioxidant\color fixative\preservative etc.
Waste Water Treatment: Used as an oxygen scavenger to eliminate the dissolved oxygen in waste water Mining: It is used for ore floatation.

Sodium Metabisulfite is an in many beacher in many industries. It is used in beaching mechanical paper pulp, cotton, wool and kaolin clay.

Packing: 25kgs/1MT/1.25MT per PP and PE bag