Oxidising Agent And Reducing Agent Sodium Hyposulphite Uses
The structure has been examined by Raman spectroscopy and single-crystal X-ray diffraction. The dithionite dianion has C
2 symmetry, with almost eclipsed with a 16° O-S-S-O torsional angle. In the dihydrated form (Na2S2O4·2H2O), the dithionite anion has gauche 56° O-S-S-O torsional angle.
A weak S-S bond is indicated by the S-S distance of 239 pm, which is elongated by ca. 30 pm relative to a typical S-S bond.Because this bond is fragile, the dithionite anion dissociates in solution into the [SO2]− radicals, as has been confirmed by EPR spectroscopy. It is also observed that 35S undergoes rapid exchange between S2O42− and SO2 in neutral or acidic solution, consistent with the weak S-S bond in the anion.
◎Chemical Name: Sodium Hydrosulphite
◎Chemical Formula：Na2S2O4
◎CAS No.:7775-14-6
◎Appearance:Free-flowing white crystalline powder
◎Odor:Odorless or with a slight odor of sulfur dioxide
Sodium Hydrosulfite redirects here. For sodium hydrogen sulfite (NaHSO3), sometimes erroneously referred to as sodium hydrosulfite, see Sodium bisulfite.
Sodium dithionite (also known as sodium hydrosulfite) is a white crystalline powder with a sulfurous odor. Although it is stable in dry air, it decomposes in hot water and in ACID solutions.
Other names:
D-Ox, Hydrolin, Reductone,sodium hydrosulfite, sodium sulfoxylate, Sulfoxylate,Vatrolite, Virtex L,Hydrosulfit, Prayon,Blankit, Albite A, Konite,Zepar, Burmol, Arostit.
(Besides,we also supply Titanium Dioxide,Formic Acid, Acetic Acid Glacial,sulphur black,Caustic Soda, PVA Resin etc.)
| . | Technical Grade | Food Grade |
| 90%Grade | 88%Grade | 85%Grade |
| Na2S2O4 |  90% |  88% |  85% |  85% |
| Iron（Fe） |  20ppm |  20ppm |  20ppm |  20ppm |
| zinc（Zn） |  1ppm |  1ppm |  1ppm |  1ppm |
| solution appearance | clear | clear | clear | clear |
| EDTA | / | / | / | qualified |
| Arsenic（As） | / | / | / |  1ppm |
| other heavy metal（as Pb） | / | / | / |  1ppm |
| Formate | / | / | / |  0.05% |
| water insolubles |  0.05% |  0.05% |  0.05% | / |
| shelf life（months） | 12 | 12 | 12 | 12 |
Application:
AS a reductive it is widely used in printing and dyeing industry, as dyeing assistant for cotton textile, as a bleaching agent for silk, woollen fabrics etc. It is also used in bleach sugar juice, maltose etc. in food industry, as raw material in pharmaceutical industry as well as synthetic dyestuff. In addition, it is applied in copperplate printing process and also as an analytical reagent.
Package :by 25kgs/bag or 50kgs/drum
Product Categories : ACID > Sodium Hydrosulfite
