(See Table 1.)
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Nonproprietary name: pirenoxine.
Chemical name: 1-hydroxy-5-oxo-5H
Molecular formula: C16
Molecular weight: 308.25.
Pirenoxine occurs as a yellow-brown powder. It is odorless and has a slightly bitter taste. It is very slightly soluble in dimethylsulfoxide, and practically insoluble in water, in acetonitrile, in ethanol (95), in tetrahydrofuran and in diethyl ether.
Melting point: about 250°C (with decomposition).