CAS： 461-58-5
MF： C2H4N4
Appearance： white powder
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Description |
Dicyandiamide, also known as cyanoguanidine, is a derivative of guanidine where one amino hydrogen is replaced by a cyano group. Its chemical formula is C2H4N4, and it is primarily used to slow down the conversion of ammonium to nitrate in the soil, reducing nitrogen loss through leaching and nitrous oxide (N2O) emissions. |
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Uses |
Dicyandiamide (DCD) falls under the category of chemical compounds and is classified as a nitrification inhibitor and curing agent. It has wide applications in agriculture, pharmaceuticals, and industrial processes, particularly as a fertilizer additive and resin curing agent. Dicyandiamide is widely used in agriculture as a nitrification inhibitor, particularly in nitrogen-rich fertilizers and animal manure treatment. It inhibits the activity of ammonium-oxidizing bacteria, allowing for longer ammonium retention in the soil and reducing nitrate leaching and nitrous oxide emissions. |
| Solubility | Soluble in water, alcohol, ethylene glycol, and dimethylformamide. Insoluble in ether and benzene. |
| Production | Dicyandiamide is synthesized by reacting cyanamide with a base or by reacting metal cyanamide with water. It can be further purified by recrystallization from water or ethanol. |
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Flammability and Explosibility |
Nonflammable |
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Synthesis |
Dicyandiamide is produced through the hydrolysis of calcium cyanamide. After filtration and neutralization with carbon dioxide, cyanamide is polymerized under alkaline conditions to form dicyandiamide. The final product is obtained through crystallization and drying. |
InChI:InChI=1/C2H4N4/c3-1-6-2(4)5/h(H4,4,5,6)/p+1
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The action and decomposition of dicyandiamide (DCD), a nitrification inhibitor, is discussed. DCD is especially efficient when used with animal manure slurries or potato starch waste water. As a consequence, nitrate leaching can be reduced, yields and N uptake increased. DCD‐amended mineral N fertilizers applied once can substitute for split N applications, thus reducing labor costs without any loss in crop yield and quality.
Using the tabulated data of Hauser and Haselwandter (1990), from a nutrient solution maintained at 25 °C and containing the soil bacteria strain called EK1, we fitted the first-order exponential degradation model . The regression analysis yielded t½ = 9 d. For the same experimental system, Schwarzer and Haselwandter (1991) reported that Dicyandiamide (DCD) degradation occurred over a temperature range of 10–33 °C with the fastest degradation rate at 25 °C.
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| Conditions | Yield |
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zerfaellt beim Schmelzpunkt;
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