Is sodium hydrosulfite a bleach?
Hydrosulfite. Sodium dithionite is a reductive bleaching chemical. It is also known as sodium hydrosulfite. Reductive bleaching is especially essential not only for bleaching but also for removing color from colored recovered paper and carbonless paper (Hache et al., 1994, 2001).
Is sodium hydrosulfite toxic?
Toxic if swallowed. Skin May be harmful if absorbed through skin. May cause skin irritation. Eyes May cause eye irritation.
What does sodium dithionite do?
Sodium dithionite (SDT) is a reducing agent used in conservation, mainly for iron stain removal from both organic and inorganic substrates, and occasionally to treat corroded copper and silver artifacts.
Is sodium hydrosulfite a sulfate?
Sodium hydrosulfite (Sodium dithionite, Sodium hypodisulfite, Na2S2O4) is a white crystalline sodium salt. It decomposes in the presence of atmospheric oxygen to afford sodium hydrogen sulfate. It has been prepared by reducing sodium hydrogen sulfite in sulfurous acid solution with zinc.
What is another name for sodium hydrosulphite?
Sodium dithionite
| Names | |
|---|---|
| Other names D-Ox, Hydrolin, Reductone sodium hydrosulfite, sodium sulfoxylate, Sulfoxylate Vatrolite, Virtex L Hydrosulfit, Prayon Blankit, Albite A, Konite Zepar, Burmol, Arostit | |
| Identifiers | |
| CAS Number | 7775-14-6 |
| 3D model (JSmol) | Interactive image |
What does sodium dithionite do to jeans?
Sodium hydrosulphide chemical is used as the main reducing agent in conventional denim dyeing methods. Although sodium hydrosulfite is advantageous in terms of cost, it is preferred by enterprises it causes degradation of dyeing stability and loss of stability due to oxygen degradation in air.
How does sodium dithionite reduce?
Sodium dithionite has been shown to reduce vinylic sulfones to alkenes via an addition/elimination mechanism. This method is stereospecific and results in retention of alkene geometry. Sodium dithionite has also been used as the reducing agent in viologen-mediated reduction of α-nitro sulfones.
Is NaHS a salt?
NaHS and sodium sulfide are used industrially, often for similar purposes. Solid NaHS is colorless. The solid has an odor H2S owing to hydrolysis by atmospheric moisture….Sodium hydrosulfide.
| Names | |
|---|---|
| Other names Sodium bisulfide Sodium sulfhydrate Sodium hydrogen sulfide | |
| Identifiers | |
| CAS Number | 16721-80-5 207683-19-0 (hydrate) |
What does sodium dithionite do to Haemoglobin?
The crystal state binding of sodium dithionite to deoxyhemoglobin is reported. Dithionite has been used extensively to deoxygenate hemoglobin and myoglobin and there has been considerable interest among users of dithionite about its effect on protein structure and binding site(s).
How do you make sodium hydrosulfite?
Sodium hydrosulfite is manufactured in the US by several process routes: the reaction of sodium formate (HCOONa) with caustic soda and sulfur dioxide, in an aqueous methanol solution; by reducing sodium bisulfite (NaHSO3) with electrolytically produced sodium amalgam (NaxHgx); or by reacting sulfur dioxide solution …
How is sodium hydrosulphite made?
Sodium dithionite is produced industrially by reduction of sulfur dioxide. Approximately 300,000 tons were produced in 1990. The route using zinc powder is a two-step process: 2 SO2 + Zn → ZnS2O.
What does sodium dithionite do to indigo?
Sodium dithionite gives effective reduction of indigo as well as other vat dyes and it enables very short fixing times in various dyeing methods and produces levelness in continuous dyeings (Božič and Kokol, 2008).
How is sodium hydrosulfite used in the textile industry?
Sodium hydrosulfite is commonly used in the pulp and paper industry for bleaching brightening and de-colorization of virgin and recycled fiber. It is also applied extensively to brighten Kaolin clay. In textiles, the primary usage is in processing vat dyes and indigo dyes.
What can sodium hydrosulphite be used for?
It is also applied extensively to brighten Kaolin clay. In textiles, the primary usage is in processing vat dyes and indigo dyes. Other applications include water treatment, leather processing and food bleaching (sugar, honey and gelatin).
What kind of reducing agent is sodium hydrosulfite?
It also possesses good stability in storage. Hydrosulfite, sometimes also referred to as dithionite, is a strong reducing agent. In the mill, usually sodium hydrosulfite is used (although zinc hydrosulfite was also used earlier).
Can a sodium hydrosulfite be stored in water?
Our solid sodium hydrosulfite is highly stable when stored in dry closed containers. However, solid sodium hydrosulfite is a very reactive chemical which can decompose when exposed to air and moisture or in contact with small amount of water.