White crystals precipitated from water, with two crystal water. Slightly bitter taste, non-toxic, soluble in water, slightly soluble in cold water, acidic aqueous solution, can be dissolved in an aqueous solution of potassium hydroxide and sodium hydroxide, organic solvent insoluble in cold alcohol, ether, benzene and the like. Formula C3H3N3O3, the presence of two isomers, namely keto and enol structure, usually a mixture of two isomers.
