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Derivatives of Hydroxylamine by Agnes Elizabeth Otto, 1892

Derivatives of Hydroxylamine by Agnes Elizabeth Otto, 1892, Page 12

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hydroxylammonium sulphate until all of the sulphate is precipitated as barium sulphate, -- the aqueous solution of hydroxylamine is formed. [?Fresny?], to obtain the hydroxylamine-monosulphonates pure for the preparation of salts, neutralized the hydrolysed solution with ammonia. He then added Baryta water which threw down a precipitate of a di-barium oxy-amidosulphonate. After thorough washing the salt can easily be decomposed by adding just enough sulphuric acid to combine with the barium. The filtered solution of the new acid can then be used in the
 
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