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2.6- Dihydroxyisonicotinic acid

Citrazinic acid (2,6-dihydroxyisonicotinic acid) [99-11-6] M 155.1, m >300°, pK] 3.0, pK2 4.76. Yellow powder with a greenish shade, but is white when ultra pure and turns blue on long standing. It is insoluble in H2O but slightly soluble in hot HCl and soluble in alkali or carbonate solutions. Purified by precipitation from alkaline solutions with dilute HCl, and dry in a vacuum over P2O5. The ethyl ester has m 232° (evacuated tube) and a pKa of 4.81 in MeOCH2CH20H [IR Pitha Coll Czech Chem Comm 28 1408 1963]. [Pg.171]

See other pages where 2.6- Dihydroxyisonicotinic acid is mentioned: [Pg.185]    [Pg.185]    [Pg.171]    [Pg.376]    [Pg.238]    [Pg.394]    [Pg.1006]    [Pg.185]    [Pg.185]    [Pg.171]    [Pg.376]    [Pg.844]    [Pg.238]    [Pg.394]    [Pg.1006]   
See also in sourсe #XX -- [ Pg.237 ]



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