White crystals. Depolymerization to cyanate and isocyanic acid at about 330 °C. The precipitated from water contains 2 molecules of crystal water, and the relative density is 1.768 (0 ° C), which is lost in the air and weathered; the precipitated from concentrated hydrochloric acid or sulfuric acid is anhydrous crystal. 1g can be dissolved in about 200ml of water, odorless, slightly bitter taste. Cyanuric acid is a cyclic trimer of cyanic acid (HOCN), also known as "cyanuric acid", which belongs to the class of triazines. It has multiple tautomers, a trisphenol form and a triketone form. Analysis of the solid cyanuric acid by X-ray and analysis by ultraviolet and infrared spectroscopy revealed that the cyanuric acid molecule is mainly present in the form of a triketone, and the monohydroxy form in the solution may also be present in a small amount.
Character White crystal. It is odorless and tastes bitter. Melting point >360°C (decomposition) Boiling point Solidification point Relative density 2.500 Refractive index Flash point Solubility Soluble in water, hot ethanol, pyridine, concentrated hydrochloric acid and hot sulfuric acid, insoluble in cold methanol, ether, acetone, benzene and chloroform.
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