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The most feasible method consists in the reduction of diazonium salts with sodiumsulfite.
2
The rapid addition of the diazonium salt solution to the sodiumsulfite seems to be advantageous.
3
The sodiumsulfite solution is placed in a 12-l. flask and cooled to about 5'0.
4
The flask is now warmed to about 20'0 on a steam bath, until the solid sodiumsulfite, which has separated while cooling, redissolves.
Usage of sodium sulphite in English
1
Generally speaking, the sulphuretted hydrogen and sodiumsulphite methods are to be preferred.
2
Because of this reaction sodiumsulphite is used as a convenient source of sulphur dioxide.
3
The sodiumsulphite method has the advantages of being clean and neat, and of requiring no nitration.
4
The jute acetate showed the normal reaction with chlorine, and the lignone chloride was dissolved by treatment with sodiumsulphite solution.
5
In addition, if an excess of sodiumsulphite has been used and enough acid not subsequently added, the excess will count as iron.
6
Moreover, an investigation of the products dissolved by sodiumsulphite solution from the chlorinated fibre has shown that they are practically free from furfuroids.