Title: Cyamelide
CAS Registry Number: 462-02-2
CAS Name: 1,3,5-Trioxane-2,4,6-triimine
Additional Names: insoluble cyanuric acid
Molecular Formula: C3H3N3O3
Molecular Weight: 129.07
Percent Composition: C 27.92%, H 2.34%, N 32.56%, O 37.19%
Literature References: Formed by polymerization of cyanic acid (gaseous or liquid). Prepd by digesting equal parts of potassium cyanate and oxalic acid: Liebig, Wöhler, Berzelius Jahresber. 11, 85. Crude cyamelide contains cyanuric acid which is removed by washing with water: Senier, Walsh, J. Chem. Soc. 81, 290 (1902). Mechanism of polymerization: Werner, Fearon, ibid. 117, 1358 (1920).
Properties: White amorphous powder. Practically insol in water. Insol in organic solvents. Slightly sol in ammonia water, in concd acids, in concd NaOH with salt formation.
Cyanamide Cyanazine Cyanic Acid Cyanidin Chloride Cyanoacetamide

Cyamelide is an amorphous white solid (HNCO)x and is the polymerisation product of cyanic acid together with its cyclic trimer cyanuric acid. It is a porcelain-like white substance which is absolutely insoluble in water.