Model Number

CASNO.: 7681-57-4

Molecular Formula: Na2S2O5
Molecular Weight:190.10
CASNO.: 7681-57-4

Properties& Applications:
White or light yellow crystal powder; It is easily soluble in the water and has strong deliquescence; Mordant of printing and dyeing; Dechloronat of textile after bleaching; Sulphonated agent and reducer of chemical industry and pharmacy; Bleaching agent of paper pulp, bamboo and timber; Bleaching agent of mineral-dressing of nonferrous.

Packing&Storage:
Packed in 25kg or 50kg plastic woven bags with polyethylene liner; Stored in dry and cool warehouse with packages sealed and away from rain and wetting.

Quality Standard: HG/T 2826?997 (Industry Grade) / GB 1893?6 (Food Grade)
Item Index Industrial Grade Feed Grade
Content(as Na2S2O2)%min 96 ???
Content(as SO2)%min 0.2 65
Iron (Fe)%max 0.002 0.005
Water insoluble matter% max 0.05 0.05
Arsenic(As)% max 0.001 0.002
Heavy metal(as PH)% max 0.001 0.002
PH Value ?? 4-6