Appearance: White free-flowing crystalline powder
Odor: Odorless or with a slight sulfur dioxide smell
Application:
● Textile Industry: Serves as a key reducing agent and bleaching agent, widely used in vat dyeing, printing, silk scouring and bleaching, as well as fabric stripping and dyeing equipment cleaning.
● Paper Industry: Functions as an efficient bleaching agent for mechanical pulp, thermomechanical pulp, and chemical pulp, particularly regarded as the ideal choice for wood pulp papermaking.
● Bleaching Applications: Used as a reductive bleaching agent for the bleaching and whitening of kaolin, fur, bamboo products, and straw woven goods.
● Chemical Synthesis: Acts as a universal reducing agent in the chemical industry and is used in mineral processing and the synthesis of thiourea and other sulfides.
● Food Processing (Food Additive Grade): Employed as a bleaching agent and preservative in various foods such as preserved fruits, dried fruits, dried vegetables, vermicelli, sugar, and canned mushrooms.
Specification:
Item | Specification | Result |
Purity (wt%) | 88min | 88.34 |
Na2CO3 (wt%) | 2.5-3.0 | 2.7 |
Na2S2O3 (wt) | 0.5-1.0 | 0.58 |
Na2S2O5 (wt%) | 5.0-7.0 | 6.65 |
Na2SO3 (wt%) | 0.5-1.5 | 0.63 |
Fe(ppm) | 20 max. | 16 |
Water Insoluble | 0.1 | 0.03 |
Total other heavy metals (wt%) | 10 max. | 9 |
Appearance | White crystalline powder | |
Packing:
15kg, 25kg, 50kg, 100kg, 200kg or 900kg net in iron drums with double inner polybags.
