Magnesium sulphite

Magnesium sulphite MgS03-6H30 Sodium Periodate NaIO/3RO... 

Aluminium equipment has occasionally been used for the treatment of synthetic fibres with magnesium sulphite (solution of 50% MgS03). 

Magnesium fluorosilicate Mercuric chloride Nickel chloride Nickel sulphate Potassium bisulphate Potassium bisulphite Potassium sulphite Silver nitrate... 

Hydrogen sulphide is present in many mineral springs, and even free sulphur is occasionally found therein.2 Many metallic sulphides, for example, iron pyrites, galena, zinc blende, stibnitc and cinnabar, occur abundantly. Sulphur dioxide, sulphites, sulphuric acid and sulphates are also found in nature, more especially in waters springing from volcanic earth, whilst the sulphates of certain metals such as calcium, barium and magnesium exist in large deposits. 

Sulphur Dioxide as an Oxidising Agent.—Sulphur dioxide does not support the combustion of most substances which burn in oxygen, but many metals, e.g. sodium, potassium, magnesium and finely divided lead, when heated in a stream of the gas undergo conversion into a mixture of sulphide and oxide or sulphite, so much heat being liberated that the mass becomes incandescent in the case of the alkali metals some thiosulphate also may be formed.12... 

Calcium bisulphite is largely used in the manufacture of sulphite pulp, from which paper and viscose silk (see p. 264) may be produced. Wood chips or shavings are boiled with the bisulphite under pressure and so yield cellulose, which at the same time is bleached. The bisulphites of magnesium and the alkali metals are also sometimes used. 

This diethyl sulphite is a colourless liquid of b.pt. 161° C., and is quite distinct from the foregoing isomeric ethyl ethylsulphonate (which boils at 207° C.), being decomposed by aqueous alkali with formation of alkali sulphite and ethyl alcohol2 and reacting with organo-magnesium... 

Some reported examples of the use of PBC analysis to predict crystal morphology include hexamethylenetetramine (Hartman and Perdok, 1955), calcium sulphate (gypsum) (van Rosmalen, Marchee and Bennema, 1976), anthracene (Hartman, 1980), magnesium hydrogenphosphate (newberyite) (Boistelle and Abbona, 1981), sodium sulphite and potassium sulphate (Follner and Schwarz, 1982), succinic acid (Davey, Mullin and Whiting, 1982), sucrose (Aquilano et al, 1983). 

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