Sodium dithionate

• 7631-94-9
• 10101-85-6 (dihydrate )

Colorless solid

Fixed

2.19 g · cm -3

200 ° C ( decomposition)

Soluble in water ( 13.39 % by weight at 20 ° C)

Template: Infobox chemical / molecular formula search available

Sodium dithionate is an inorganic chemical compound of sodium from the group of dithionates.

Production and representation

Sodium dithionate can be obtained by reaction of Mangandithionat (shown by the reaction of manganese dioxide with sulfur dioxide ) with sodium carbonate.

Alternatively, it may also be represented by a reaction of sodium carbonate with hot Bariumdithionatlösung or sodium sulfate.

Properties

Sodium dithionate is a colorless, very air-stable solid which is readily soluble in water and insoluble in alcohol. He is in the form of a dihydrate, in which heating between 60 and 110 ° C, the crystal water is given. Above 200 ° C takes place in quantitative decomposition of sodium sulfate and sulfur dioxide. The dihydrate has an orthorhombic crystal structure with space group Pnma.