Sodium Thiosulfate → Sulfur Dioxide

HRID 896941

Reaction equation

HRID 896941 reaction equation
[Mg:1].[S:2](=[O:6])(=S)([OH:4])[OH:3].[S:7]([O-])([O-:10])(=[O:9])=S.[Na+].[Na+].[Cl-].[Mg+2].[Cl-].S([O-])([O-])=[O:18].[Mg+2].[S]>O>[S:2]([O-:6])([O-:4])=[O:3].[Mg+2:1].[OH-:9].[Mg+2:1].[OH-:18].[S:7](=[O:10])=[O:9]

Participants

9

Reactant 5

HCID 24477Sodium ThiosulfateHCID 3014583Magnesium sulfiteHCID 5360315Magnesium ChlorideHCID 5362487SulfurHCID 86597514Thiosulfuric acid magnesium

Product 3

HCID 1119Sulfur DioxideHCID 73981Magnesium HydroxideHCID 3014583Magnesium sulfite

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

This JP publication also describes the formation of “thiosulfuric acid magnesium, MgS2O3.6H2O” by the reaction of sodium thiosulfate with Magnesium chloride and also from Magnesium Sulfite with sulfur and excess Mg(OH)2. Magnesium sulfite is first produced from magnesium hydroxide, water and sulfur dioxide. The solubility of Mg(OH) is 0.004% in water at 100° C. There is no mention of sulfite consistency or concentration of the product.

Sources & evidence

ORD record
ord-a8ba6e28dd404ac2bbc970aa9598a66c
Source dataset
uspto-grants-2005_07
Patent number
US06921523B2

Linked notes

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