Products Description
Sodium Hydrosulfite (Na₂S₂O₄) is a powerful bleaching and reducing agent.
Product: Sodium hydrosulfite
Appearance: Free-flowing white crystalline powder
Odor: Odorless or with a slight odor of sulfur dioxide
CAS No: 7775-14-6
Purity: 90% ,88% ,85%
MF: Na2S2O4
Usage: widely used in textile industry for vat dyeing, reduction cleaning, printing and stripping etc.
Technical Parameter
|
Test Items |
Standard |
Test result |
|
Appearance |
White Crystalline powder |
White Crystalline powder |
|
Sodium hydrosulfite ≥ % |
90 |
90.30 |
|
Na 2 S 2 O 3 (wt%) ≤ |
1.2 |
0.90 |
|
Na 2 S 2 O 5 (wt%) |
5-7 |
6.4 |
|
NaHSO3(wt%)≤ |
0.5 |
0.3 |
|
HCOONa(wt%) |
0.5 |
0.31 |
|
Zn (wt%)≤ |
0.0001 |
0.00008 |
|
Fe (wt%)≤ |
0.005 |
0.003 |
|
Water insoluble ≤ % |
0.1 |
0.07 |
Products Description
Applications of Sodium Hydrosulfite in Textile Industry
Vat Dyeing：Reduces insoluble dyes (e.g., indigo) to soluble form for fiber coloring, then re-oxidizes for vibrant, long-lasting shades.
Reduction Clearing：Removes unfixed disperse dyes from fabric surfaces, improving color fastness (especially for polyester).
Post-Printing Treatment：Clears background stains/floaters to sharpen patterns (e.g., discharge printing).
Bleaching：Bleaches natural fibers (cotton/silk/wool) and nylon without heavy metal residues, preserving softness.
Export Market
Main Export Markets for Sodium Hydrosulfite (Textile Auxiliary Agent):
Major Asian Textile Hubs
India (world's largest textile cluster)
Bangladesh (2nd largest garment exporter)
Vietnam
Pakistan
Indonesia
Turkey
Brazil
Emerging Markets
Cambodia/Myanmar
Mexico
Uzbekistan
Hot Tags: 50kg drum industry grade sodium hydrosulfite for textile, China, manufacturers, suppliers, factory, price, Sodium chlorite powder, Sodium Thiosulfate, Sodium Thiosulphate, Sodium Hydroxide, sodium thiosulfate pentahydrate, Naoh
