Die Nitranilsäure als Basenfällungsmittel

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Abstract
Nitranilic acid (3,6-dinitro-2,5-dihydroxy-l,4-benzoquinone) offers advantages as a precipitating agent, for it is readily soluble in H2O and C2H5OH, while its salts are not. The salts crystallize well from H2O, usually in long, narrow prisms, but must not be heated too long a time. The base may be liberated from the nitranilates by treatment with KC1, ethyl acetate, Ba(0H)2, etc. When heated, nitranilates decompose without melting. Nitranilic acid may be prepared by the nitration of hydroquinone diacetate, or by the reaction of chloranil with NaN02. A bibliography of many N-containing nitranilates with their properties is given.

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