1. printing 2. Textile materials 3. Pulp and paper brightening 4. Pulp deinking 5. Kaolin clay bleaching 6. Foodstrffs

Specification	90%	88%	85%	Food grade
Na2S2O4	³90%	³88%	³85%	³85%
Fe	£20ppm	£20ppm	£20ppm	£20ppm
Zn	£ 1ppm	£ 1 ppm	£1ppm	£ 1ppm
Solution Appearance	Clear	Clear	Clear	Clear
Other heavy metal (as pb)
HCHO				<0. 05%
Water insoluble matter	£0.05%	£0.05%	£0.05%
Reserve period (months)	12	12	12	12

Application:

1. Vat dyeing,printing and stripping,reduction cleaning2. Textile materials(silk,wool,nylon and other fibers)bleaching3. Pulp and paper brightening4. Pulp deinking5. Kaolin clay bleaching6. Foodstrffs(srgar,honey,gelatin,etc)bleaching7. chemical synthesizing

Sodium Hydrosulphite