Sentence Examples


  • Zinc and hydrochloric acid in the cold convert it into alloxantin, hydroxylamine gives nitroso-barbituric acid, C 4 H 2 N 2 0 3: NOH, baryta water gives alloxanic acid, C 4 H 4 N 2 0 5, hot dilute nitric acid oxidizes it to parabanic acid, hot potassium hydroxide solution hydrolyses it to urea and mesoxalic acid and zinc and hot hydrochloric acid convert it into dialuric acid, C4H4N204.
  • C ALLOXANTIN $ H 4 N 4 0 7.3H 2 0, a product obtained by the combination of alloxan and dialuric acid, probably possessing the constitution NH - CO CO - NH O - O - H NH - C CO - NH one of the three molecules of water being possibly constitutional.
  • The formation of murexide is used as a test for the presence of uric acid, which on evaporation with dilute nitric acid gives alloxantin, and by the addition of ammonia to the residue the purple red colour of murexide becomes apparent.
 
 

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