sodium bisulfite
Sodium bisulfite Other name: Sodium Bisulphite; sodium hydrogen sulfate; sodium sulfite; Sodium hydrogen sulfite
HS code: 28321000
Cas number: 7631-90-5
Shape: White crystalline powder
Features: The smell of sulfur dioxide.Unpleasant taste.Part of the sulfur dioxide is exposed to the air and oxidized to sulfate. Soluble in 3.5 parts of cold water, boiling water of about 2 parts,about 70 parts of ethanol. Melting decomposition. Relative density 1.48. Irritant. Products often contain a variety of proportional emphasis on sodium sulfite(Na2S2O5).
Application: sodium bisulfiteUsed for cotton fabric and organic bleaching; used as a reducing agent in dyeing, papermaking,tanning,chemical synthesis and other industries; the pharmaceutical industry for the production of intermediateds Analginum and aminopyrine; edible products used as bleaching agents.preservatives,antioxidants;treatment of wastewater containing chromium,and used as a plating additive.
Specification of Sodium bisulfite:
|
Items tested |
Standard(HG/T3814-2006) |
Analytical result |
|
Purity (NaHSO3) |
99.0% |
99.8% |
|
SO2 |
64-67% |
65.1% |
|
Water insoluble |
0.03% max |
0.025% |
|
Chloride (Cl) |
0.05% max |
0.038% |
|
Iron (Fe) |
0.004% max |
0.002% |
|
Heavy metal (as Pb) |
0.001% max |
<0.001% |
|
Arsenic (As) |
0.0002% max |
<0.0002% |
|
PH Value |
4.0-5.0 |
4.6 |
