citrazinicadj.
/sɪtrəˈzɪnɪk/, U.S. /ˌsɪtrəˈzɪnɪk/ Chemistry.
citrazinic acid n. a yellow solid heterocyclic acid formed by the self-condensation of amides of citric acid.Systematic name: 2,6-dihydroxypyridine-4-carboxylic acid; C6H5NO4.
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citrazinic acid1885
1885 Jrnl. Chem. Soc. 48 i. 139 Citrazinic acid, C6H5NO4: citramide is treated with 4–5 parts of sulphuric acid (70–75 per cent).
1922 J. J. Sudborough Bernthsen's Text-bk. Org. Chem. (new ed.) xi. 272 The amides of citric acid are converted..into citrazinic acid.
1939 J. W. Matthews tr. F. Feigl Qualitative Anal. by Spot Tests (ed. 2) vi. 340 The ammonium salt of 2.6-dihydroxypyridine-4-carboxylic acid (V), or citrazinic acid, has a deep blue fluorescence in aqueous solution.
2004 G. Fischer Stabilizers Photographic Silver Halide Emulsions iv. 92 Other competing couplers form diffusible or readily hydrolysable dyes that are washed out, for example, citrazinic acid.
This entry has been updated (OED Third Edition, June 2014; most recently modified version published online March 2022).
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adj.1885