Product name: Sodium Hydrosulphite(Sodium Hydrosulfite) 

Mol. Formula: Na₂S₂O₄

Molecular wt.:174.11

Properties: The bulk specific weight is 0.7-1.0g/m³ , dissolve in water, slightly dissolve in ethanol. Give off heat and cause combustion easily. Spontaneous decomposition occurs when the temperature is higher than 85℃, heats up to 190℃cause detonation. Self-ignition point is 250℃.

Physical appearnce: free-flowing white crystalline powder

Quality Standard: HG2074-91（%）                                                        

Sodium Hydrosulphite               ≥     90        88         85                   

Water insoluble                       ≤     0.1        0.2        0.3                         

Sodium thiosulfate: Na₂S₂O₃    ≤     1.2        1.25      1.3                  

Sodium metabisulfite: Na₂S₂O₅  ≤      5          6           7                              

Sodium bisulfite:NaHSO₃            ≤    0.4        0.45      0.5                          

Sodium carbonate: Na₂CO₃        ≤    0.6        1.3        2                               

Zn                                          ≤                0.00008   

Fe                                          ≤                0.002

Packing:  15kgs, 25kgs, 50kgs or 100kgs net in iron drums with double PVC bags

Usage: This product is strength oxidant and is used as bleaching agent for textile and papermaking industry, as synthetic for medicine-making, as absorbent for analysis chemical, and as flotation agent of nonferrous color metal for metallurgical industry