C2H4N4

White crystalline powder. The solubility in water is 2.26% at 13 ℃, and it is relatively high in hot water. When the aqueous solution gradually decomposes at 80 ℃, ammonia gas is produced. The solubility of anhydrous ethanol (C2H5OH) and ether at 13 ℃ is 1.26% and 0.01%, respectively. Soluble in liquid ammonia, hot water, ethanol, acetone hydrate, dimethylformamide, insoluble in ether, insoluble in benzene and chloroform. Relative density (d254) 1.40. Melting point 209.5 ℃. Stable in nature when dry. Not burning. Verify cobalt, nickel, copper, and palladium. Organic synthesis. Nitrocellulose stabilizer. Hardening agent. Descaling agent. Sulfurization accelerator. Resin synthesis. As a latent curing agent for epoxy resin adhesive, a single component epoxy adhesive can be prepared. Only when the particle size of dicyandiamide is ≤ 5 μ m (2500 mesh), can a suspension be formed in the epoxy resin without precipitation. Reference dosage 4-12 parts, 100g epoxy resin composition has a shelf life of 6-12 months. When the dosage of dicyandiamide is 17 parts, the storage period is less than 2 months, and when the dosage is 8 parts, the storage period can reach up to six months. Curing conditions are 170 ℃/lh or 180 ℃/20min, and thermal deformation temperature is 125 ℃. Also used as a curing agent for single component waterborne epoxy adhesives. Reference dosage of 7 portions. The composite system of 5-6 parts of dicyandiamide and 3-4 parts of hydrazide can cure epoxy resin at 120 ℃/45 minutes. As a raw material for guanidine salts and melamine diamines, various guanidine salts can be produced by reacting dicyandiamide with acid. The phenyltrimeric cyanamide obtained from the reaction of dicyandiamide and phenylnitrile is an intermediate in coatings, laminates, and molding powders. The dicyandiamide resin obtained by reacting dicyandiamide and formaldehyde as a dye fixing agent can be used as a dye fixing agent. Dicyandiamide fertilizer can control the activity of nitrifying bacteria, regulate the conversion rate of nitrogen fertilizer in soil, reduce nitrogen loss, and improve the efficiency of fertilizer use. As a fine chemical intermediate, it is used in medicine to produce guanidine nitrate, sulfonamide drugs, etc; It is also used to produce thiourea, nitrocellulose stabilizer, rubber vulcanization promoter, steel surface hardening agent, artificial leather filler, adhesive, etc. The pharmaceutical intermediate 5-azacytosine can be obtained by reacting dicyandiamide with formic acid. Nitrogen doping of carbon materials as a nitrogen source