Dicyandiamide CAS 461-58-5, Dicyandiamide, CAS 461-58-5
Dicyandiamide curing agent is one of the earliest type of latent curing agents that can be cured by heating. It is solid at room temperature and insoluble in epoxy resin.
461-58-5
C2H4N4
84.08
207-312-8
| CAS | 461-58-5 |
| Molecular formula | C2H4N4 |
| Molecular weight | 84.08 |
| EIENCS | 207-312-8 |
| Form | Crystalline powder |
| Melting point | 208-211 °C (lit.) |
| boling point | 144.35°C (rough estimate) |
| Density | 1.40 |
| Solubility | H2O: 0.1g /mL, clear |
| PKA | |
| Color | White |
| Storage temp | 2-8°C |
Dicyandiamide curing agent is one of the earliest type of latent curing agents that can be cured by heating. It is solid at room temperature and insoluble in epoxy resin. It disperses in the epoxy resin in the form of micro-particles and then reacts when heated. Once heated to near the melting point, it begins to dissolve and cure rapidly.
The industrial production of dicyandiamide is achieved through the hydrolysis of lime nitrogen (with the molecular formula CaCN2), decalcification reaction and filtration to obtain monocyanamide (with the molecular formula NH2CN) liquid. Then, monocyanamide polymerization, filtration, cooling, crystallization, separation and drying are carried out to obtain dicyandiamide products.
Lime nitrogen method: Lime nitrogen (calcium cyanamide) is hydrolyzed with water to obtain a suspended calcium cyanamide hydrolysate. The calcium hydroxide filter residue is removed through vacuum filtration. The carbon dioxide produced by the decomposition of limestone is introduced into the filtrate for decalcification reaction to generate cyanamide solution. Under alkaline conditions, it polymerizes, and then undergoes filtration, cooling crystallization, separation, and drying to obtain dicyandiamide. The temperature at which 2CaCN2+2H2O→Ca(HCN2)2+Ca(HCN2)2+CO2+H2O→2NH2CN+ cacO2 →2NH2CN →(NH2CN)2 generate dicyandiamide at the maximum rate is related to pH: the pH is 9.7 at 50℃. The pH is 9.1 at 80℃. The pH is 8.8 at 100℃. The dicyandiamide content in industrial products is 99%, and each ton of the product consumes 4,239 kilograms of lime nitrogen (containing more than 21% nitrogen).
(1) As ···'!=' ')}
(1) As raw materials for guanidine salts and melamine diamines. Various guanidine salts can be produced by reacting dicyandiamide with acids. The benzene-melamine diamine obtained by the reaction of dicyandiamide and phenyl nitrile is an intermediate for coatings, laminates and molding powders.
(2) As a dye fixing agent, the dicyandiamide resin produced by the reaction of dicyandiamide and formaldehyde can be used as a dye fixing agent.
(3) Dicyandiamide fertilizers and dicyandiamide compound fertilizers can control the activities of nitrifying bacteria, regulate the transformation rate of nitrogen fertilizers in the soil, reduce nitrogen loss, and improve the efficiency of fertilizer utilization.
(4) As an intermediate in fine chemicals. It is used in medicine to produce guanidine nitrate, sulfonamide drugs, etc. It is also used to produce thiourea, nitrocellulose stabilizer, rubber vulcanization accelerator, steel surface hardener, artificial leather filler, adhesive, etc. The pharmaceutical intermediate 5-azacytosine can be obtained by the reaction of dicyandiamide with formic acid.
(5) Verification of cobalt, nickel, copper and palladium, organic synthesis, nitrocellulose stabilizer, hardener, detergent, vulcanization accelerator, resin synthesis.
{else} {/pboot:if}When dicyandiamide is heated, it decomposes and generates toxic gas containing ammonia. It reacts rapidly with strong oxidants, such as ammonium nitrate, posing a risk of fire and explosion. It reacts with acids to produce toxic gas containing hydrogen cyanide.
* Prompt reply and 24 hours online, professional team to provide best price and high quality product.
* Sample testing support.
* Every batch of products will be tested to ensureits quality.
*The packing also can be according the customers` requirment.
*Any inquiries will be replied within 24 hours.
*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.
Service Hotline
