Sodium Hydrosulfite (CAS No.: 7775-14-6)

Application: Vat dyeing, printing and stripping, reduction cleaning, 
Leaching textile materials such as silk, wool, nylon and other fibres 
Bleaching mechanical pulps, thermo-mechanical pulps, deinked pulps 
Bleaching kaolin 
Bleaching foodstuffs like sugar, honey, gelatin etc. 
Reducing agent for organic synthesis and pharmaceuticals 
Storage & handling: Being a strong reducing agent, sodium hydrosulfite can decompose easily while exposed to air and moisture no matter it is made by any kinds of production processes. The product must be stored in sealed iron drums or bulk containers in a cool dry place away from moisture, acids, oxidizing chemicals and combustible organic substances. Protect the product away from direct sunlight, heat, sparks and open flames.

*0%  GRADE	*8% GRADE	*5% GRADE	Food additive GRADE
Na 2 S 2 O 4	≥ *0%	≥ *8%	≥ *5%	≥ *5%
Water insolubles	≤ 0.*5%	≤ 0.*5%	≤ 0.*5%
Iron (Fe)	≤ *0ppm	≤ *0ppm	≤ *0ppm	≤ *0ppm
Appearance of Aqueous solution				clear
Zinc (Zn)	≤ 1ppm	≤ 1ppm	≤ 1ppm	≤ 1ppm
Arsenic ( As )				≤ 1ppm
Other heavy metals  ( as Pb )	≤ 1ppm	≤ 1ppm	≤ 1ppm	≤ 1ppm
Format ( as HCHO )				≤ 0.*5%
Shelf life ( months )	*2	*2	*2	*2