I. Introduction. Nolting and Kolinl record the preparation of an aminosulfonic acid of p-xylene to which they ascribe the formula : 1,4 6 2 CsHz (CH3) z"zS0s.H This acid was prepared by reducing with ammonium sulfide, or with tin and hydrochloric acid, the solution resulting from the treatment of p-xylenesulfonic acid with red, fuming nitric acid. The nitro-acid was not isolated, nor were any of its derivatives prepared. Guy G. Frary2 describes a nitrosulfonic acid of p-xylene which he prepared by nitrating p-xylenesulfonic acid with nitric acid (sp. gr. 1.60) in the cold. The potassium, sodium, calcium, barium, strontium, magnesium, copper, and zinc salts were prepared and of these the potassium, barkm, copper, and zinc salts were analyzed. Most of these were prepared from the crude acid solution and were purified with difficulty.
from 114 grams of glucose he got about 30 g. of hexone acids, largely gluconic acid, that is, one-fourth of the oxidation took this direction. It seems not improbable on the basis of these facts, that gluconic acid may be derived also from some other source than the positive ion. The products of oxidation of the anion C,H,,O, are possibly those which have been carefully studied by Nefl and the further mechanism of the oxidation he has largely elucidated.
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