What is dicyandiamide and its use.

Dicyandiamide white crystalline powder. The solubility is 2.26% in 13 ℃ water and higher in hot water. The aqueous solution decomposes slowly at 80 ° to produce ammonia. The solubility of anhydrous ethanol (C2H5OH) in ether was 1.26% and 0.01%, respectively. It is soluble in liquid ammonia, hot water, ethanol, acetone hydrate, dimethyl formate, ether, benzene and chloroform. Relative density (d254) 1.40. Melting point: 209.5 ℃. Stable performance during drying. It doesn't burn. Low toxicity, half lethal dose (mice, oral) > 4000mg · kg - (- 1). The maximum allowable concentration in the air is 5mg / m3. Dicyandiamide can be used as flocculant in water treatment, fixing agent in printing and dyeing industry, condensation reaction with formaldehyde to produce formaldehyde resin, and can also be used to produce various guanidine salts. It is used as latent curing agent of epoxy resin adhesive to prepare one component epoxy adhesive. As guanidine salt and cyanodiamine raw materials, various salts can be prepared by reacting with acid. Cyanuric acid is the intermediate of coating, laminating material and molding powder. Dicyandiamide resin, which is prepared by reaction of dicyandiamide and formaldehyde, can be used as dye fixing agent. Dicyandiamide compound fertilizer can control the activity of nitrifying bacteria, regulate the conversion rate of nitrogen in the soil, reduce nitrogen loss and improve fertilizer utilization. 5. As a fine chemical intermediate, it can also be used to prepare guanidine nitrate, sulfonamide, thiourea, nitrocellulose stabilizer, rubber curing accelerator, steel surface curing agent, artificial leather packaging, adhesive, etc. 5-bipyridine, a drug intermediate, was prepared by the reaction of dicyandiamide with formic acid. Carbon materials were doped with nitrogen as nitrogen source