1823 W. Henry (ed. 9) II. xii. 387 Pyro-uric acid..has been fully investigated by Chevallier and Lassaigne.
1845 1 Feb. 108/1 Cyanuric acid..was in former times designated and described as pyro-uric acid.
1962 M. P. Crosland v. i. 285 In 1829 it was found that the acids known as ‘pyro-uric’ and ‘cyanuric’ were identical and Wöhler humorously wrote to Liebig that Gmelin's reaction to the news would be ‘Thank God that there is one acid less’.