What is the oxidation state of sodium dithionite?

+5
For the reducing agent, see sodium dithionite. Sodium dithionate Na2S2O6 is an important compound for inorganic chemistry. It is also known under names disodium dithionate, sodium hyposulfate, and sodium metabisulfate. The sulfur can be considered to be in its +5 oxidation state.

What 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.

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 dithionite the same as sodium hydrosulfite?

Sodium dithionite is a reductive bleaching chemical. It is also known as sodium hydrosulfite.

What happens to sodium dithionite in absence of air?

In absence of air, it decomposes quickly above 150 °C to sodium sulfite, sodium thiosulfate, sulfur dioxide and trace amount of sulfur. Sodium dithionite is a reducing agent. At pH=7, the potential is -0.66 V vs NHE. Redox occurs with formation of sulfite: Sodium dithionite reacts with oxygen:

Which is the conjugate base of a dithionite?

Dithionite (2-) is a sulfur oxide and a sulfur oxoanion. It is a conjugate base of a dithionite (1-). Dithionite. The dithionous acid ion and its salts.

Why is sodium dithionite used as a chelating agent?

Hence, iron extracted by sodium dithionite is also referred to as “free iron.”. The strong affinity of the dithionite ion for bi- and trivalent metal cations (M 2+, M 3+) allows it to enhance the solubility of iron, and therefore dithionite is a useful chelating agent .

How is sodium dithionite used in the textile industry?

In addition to the textile industry, this compound is used in industries concerned with leather, foods, polymers, photography, and many others. Its wide use is attributable to its low toxicity LD 50 at 5 g/kg, and hence its wide range of applications. It is also used as decolourising agent in organic reactions.