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calcium-cyanamide (n.)
1.a compound used as a fertilizer and as a source of nitrogen compounds
Calcium Cyanamide (n.)
1.(MeSH)A cyanide compound which has been used as a fertilizer, defoliant and in many manufacturing processes. It often occurs as the calcium salt, sometimes also referred to as cyanamide. The citrated calcium salt is used in the treatment of alcoholism.
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Calcium Cyanamide (n.) (MeSH)
Abstem (MeSH), Calcium Carbimide (MeSH), Carbimide (MeSH), Citrated Calcium Cyanamide (MeSH), Colme (MeSH), Cyanamide (MeSH), Cyanamide, Calcium (1:1) Salt (MeSH), Cyanamide, Calcium (2:1) Salt (MeSH), Cyanamide, Calcium Salt (MeSH), Ipsen Brand of Calcium Carbimide (MeSH), Temposil (MeSH)
calcium-cyanamide (n.)
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Calcium Cyanamide (n.) [MeSH]
Cyanides, Isocyanides - Carbodiimides[Hyper.]
calcium-cyanamide (n.)
chemical compound, compound[Hyper.]
Wikipedia
Calcium cyanamide | |
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Calcium cyanamide |
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Other names
Cyanamide calcium salt, Lime Nitrogen, UN 1403, Nitrolime |
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Identifiers | |
CAS number | 156-62-7 |
PubChem | 4685067 |
ChemSpider | 21106503 |
UNII | ZLR270912W |
EC number | 205-861-8 |
UN number | 1403 |
RTECS number | GS6000000 |
Jmol-3D images | Image 1 |
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Properties | |
Molecular formula | CaCN2 |
Molar mass | 80.102 g/mol |
Appearance | White solid (Often gray or black from impurities) |
Odor | odorless |
Density | 2.29 g/cm3 |
Melting point |
1340 °C [1] |
Boiling point |
1150-1200 °C (sublim.) |
Solubility in water | Reacts |
Hazards | |
MSDS | ICSC 1639 |
EU Index | 615-017-00-4 |
EU classification | Harmful (Xn) Irritant (Xi) |
R-phrases | R22 R37 R41 |
S-phrases | (S2) S22 S26 S36/37/39 |
NFPA 704 | |
Flash point | Non-flammable |
Related compounds | |
Related compounds | Cyanamide Calcium carbide |
(verify) (what is: / ?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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Infobox references |
Calcium cyanamide or CaCN2 is a calcium compound used as fertilizer,[2] first synthesized in 1898 by Adolph Frank and Nikodem Caro (Frank-Caro process).[3] It is formed when calcium carbide reacts with nitrogen. It is commercially known as Nitrolime.
The reaction takes place in large steel chambers. An electric carbon element heats the reactants to red heat. Nitrogen is pressurised at 2 atmospheres.
It crystallizes in hexagonal crystal system with space group R3m and lattice constants a = 3.67, c = 14.85 (.10−1 nm).[4]
Contents |
Calcium cyanamide is prepared from calcium carbide. The carbide powder is heated at about 1,000°C in an electric furnace into which nitrogen is passed for several hours. The product is cooled to ambient temperatures and any unreacted carbide is leached out cautiously with water.
The main use of calcium cyanamide is in agriculture as a fertilizer.[2] In contact with water it decomposes and liberates ammonia:
It was used to produce sodium cyanide by fusing with sodium carbonate, which was used in cyanide process in gold mining:
It can also be used in the preparation of calcium cyanide and melamine.
Through hydrolysis, calcium cyanamide produces cyanamide.
The conversion is conducted on slurries, consequently most commercial cyanamide is sold as an aqueous solution.
Thiourea can be produced by the reaction of hydrogen sulfide with calcium cyanamide in the presence of carbon dioxide.[5]
Calcium cyanamide is also used as a wire-fed alloy in steelmaking, in order to introduce nitrogen into the steel.
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