ChemicalBook > CAS DataBase List > Calcium cyanamide

Calcium cyanamide

Product Name
Calcium cyanamide
CAS No.
156-62-7
Chemical Name
Calcium cyanamide
Synonyms
Calcium carbimide;nitrolime;Metformin Impurity 8;dormex;alzodef;ccc[qr];cy-l500;nitrolim;usafcy-2;nci-c02937
CBNumber
CB0297271
Molecular Formula
CCaN2
Formula Weight
80.1
MOL File
156-62-7.mol
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Calcium cyanamide Property

Melting point:
>300 °C(lit.)
Density 
2.29
form 
Powder
color 
Gray to dark gray
Specific Gravity
2.29
Water Solubility 
insoluble H2O, but undergoes hydrolysis releasing acetylene and ammonia [HAW93] [MER06]
Sensitive 
Moisture Sensitive
Merck 
14,1662
BRN 
4124391
InChIKey
QFSRQFUIHVTIDL-UHFFFAOYSA-N
CAS DataBase Reference
156-62-7(CAS DataBase Reference)
EPA Substance Registry System
Calcium cyanamide (156-62-7)
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Safety

Hazard Codes 
Xn,F
Risk Statements 
22-37-41-15-43-37/38
Safety Statements 
26-39-43-36/37/39-22-45-28
RIDADR 
UN 1403 4.3/PG 3
WGK Germany 
2
RTECS 
GS6000000
9-21
TSCA 
Yes
HazardClass 
4.3
PackingGroup 
III
HS Code 
31029010
Hazardous Substances Data
156-62-7(Hazardous Substances Data)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H261In contact with water releases flammable gas

H302Harmful if swallowed

H315Causes skin irritation

H317May cause an allergic skin reaction

H318Causes serious eye damage

H335May cause respiratory irritation

Precautionary statements

P280Wear protective gloves/protective clothing/eye protection/face protection.

P231+P232Handle under inert gas. Protect from moisture.

P333+P313IF SKIN irritation or rash occurs: Get medical advice/attention.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
438928
Product name
Calcium cyanamide
Purity
technical grade
Packaging
500g
Price
$83.7
Updated
2021/12/16
Alfa Aesar
Product number
089462
Product name
Calcium cyanamide, tech.
Packaging
500g
Price
$132
Updated
2021/12/16
Alfa Aesar
Product number
089462
Product name
Calcium cyanamide, tech.
Packaging
100g
Price
$40.6
Updated
2021/12/16
TRC
Product number
C145785
Product name
CalciumCyanamide
Packaging
10g
Price
$60
Updated
2021/12/16
American Custom Chemicals Corporation
Product number
ING0006901
Product name
CALCIUM CYANAMIDE
Purity
95.00%
Packaging
500G
Price
$185.85
Updated
2021/12/16
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Calcium cyanamide Chemical Properties,Usage,Production

Chemical Properties

Calcium cyanamide is a blackish-gray, shiny crystalline material or powder.

Physical properties

Pure product is a colorless, hexagonal crystal or white powder. Commercial grade material may be grayish-black powder or lump (the color is due to presence of calcium carbide and other impurities); density 2.29 g/cm3; melts around 1,340°C; sublimes around 1,150 to 1,200°C on rapid heating; reacts with water.

Uses

Manufacture of calcium cyanide and dicyandiamide; formerly used as a defoliant and herbicide

Uses

Calcium Cyanamide is used as a fertilizer, herbicide, insecticide, a steel-making additive and an ore processing material. It can also be used to make thiourea, guanidine and ferrocyanides. manufacture of calcium cyanide, melamine, dicyandiamide.

Uses

Calcium cyanamide has its major use as a fertilizer. However, it has a number of other uses, such as a herbicide and a defoliant for cotton plants. It is finding increasing use as a chemical intermediate. For example, it is being used to produce dicyandiamide, which in turn can be polymerized to form the widely used monomer, melamine. The conversion to calcium cyanide and hence into a variety of other uses is also important commercially.

Definition

ChEBI: The calcium salt of cyanamide, formed when calcium carbide reacts with nitrogen

Definition

calcium cyanamide: A colourlesssolid, CaCN2, which sublimes at1300°C. It is prepared by heating calciumdicarbide at 800°C in a streamof nitrogen:
CaC2(s) + N2(g) → CaCN2(s) + C(s)
The reaction has been used as amethod of fixing nitrogen in countriesin which cheap electricity isavailable to make the calcium dicarbide(the cyanamide process). Calciumcyanamide can be used as afertilizer because it reacts with waterto give ammonia and calcium carbonate:
CaCN2(s) + 3H2O(l) → CaCO3(s) +2NH3(g)
It is also used in the production ofmelamine, urea, and certain cyanidesalts.

Production Methods

Calcium cyanamide was first produced commercially around 1900 as a fertilizer. The process of making calcium cyanamide involves three raw materials—coke, coal, and limestone— plus nitrogen. The limestone (calcium carbonate) is burned with coal to produce calcium oxide. The calcium oxide is then allowed to react with amorphous carbon in the furnace at 2000°C with the formation of calcium carbide (CaC2). Finely powdered calcium carbide is heated to 1000°C in an electric furnace into which pure nitrogen is passed. It is then removed and uncombined calcium carbide removed by leaching.

Preparation

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.
CaC2 + N2 → CaCN2 + C (ΔHƒ°= –69.0 kcal/mol at 25°C)

General Description

A colorless to gray, odorless solid. May cause illness from ingestion. May irritate the skin. If exposed to water or high temperatures, calcium cyanamide may generate toxic and flammable fumes. Used to make pesticides and in fertilizers.

Air & Water Reactions

Depending on the calcium carbide content, the cyanamide reacts with water (moisture from air or soil) to produce acetylene and hydrated calcium oxide or calcium hydroxide. Absorption of water during handling or storage of technical calcium cyanamide may cause explosion [Pieri, M. Chem. Abs. 46, 8335 1952].

Reactivity Profile

When hydrated CALCIUM CARBIDE generates salts of calcium that are basic and are generally soluble in water. The resulting solutions contain moderate concentrations of hydroxide ions and have pH's greater than 7.0. They react as bases to neutralize acids. These neutralizations generate heat, but less or far less than is generated by neutralization of the bases in reactivity group 10 (Bases) and the neutralization of amines. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible.

Hazard

Fire risk with moisture or combined with calcium carbide. Skin, eye, and upper respiratory tract irritant. Questionable carcinogen.

Health Hazard

Inhalation or contact with vapors, substance or decomposition products may cause severe injury or death. May produce corrosive solutions on contact with water. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution.

Fire Hazard

Produce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard.

Agricultural Uses

Calcium cyanamide (CaCN2) is a dark colored, granulated material containing around 21 % nitrogen. Its dark color is due to the presence of calcium carbide. Calcium cyanamide is produced by heating a mixture of limestone with coal in a nitrogen atmosphere.
Generally, the process is carried out in three steps. In the first step, calcium carbonate (limestone) is decomposed at about 1100°C.
In the second step, calcium oxide (CaO) and coke (or coal) are heated in an electric furnace to produce calcium carbide.
The final step involves heating the powdered calcium carbide at about 1100°C with pure nitrogen (produced by liquefaction of air and fractional distillation) to produce calcium cyanamide.
The fertilizer-grade calcium cyanamide contains 21 % nitrogen, 11 % calcium, 11 % free carbon, 5% oil, 2 to 4% water and oxides of aluminum, iron and silicon. In the presence of moisture and air, calcium dicyandiamide (a poisonous compound) is formed. It distinctly leaves alkalinity in the soil equivalent to 1.3 kg calcium carbonate (CaCO3) per 0.45 kg of nitrogen applied. At pH 7 or below, calcium dicyandiamide is converted into urea and lime within one week of its being in the soil.
When dry, calcium cyanamide is dusty but it is generally used as granules. It is poisonous, irritating to the skin and used as a pesticide, fertilizer and defoliant in cotton. It is as good a fertilizer as sodium nitrate or ammonium sulphate, but not as fast acting.
Calcium cyanamide is an excellent weed killer, especially for tobacco plants, when applied 2 to 3 weeks before sowing. It is also used for producing melamine, urea and certain cyanide salts.

Safety Profile

Poison by ingestion, inhalation, sh contact, intravenous, and intraperitoneal routes. Moderately toxic to humans by ingestion. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. The fatal dose, by ingestion, is probably around 20 to 30 g for an adult. It does not have a cyanide effect. Calcium cyanamide is not believed to have a cumulative action. Flammable. Reaction with water forms the explosive acetylene gas. When heated to decomposition it emits toxic fumes of NOx and CN-. See also CALCIUM COMPOUNDS, AMIDES, and CYANIDE

Potential Exposure

Calcium cyanamide is used in agriculture as a fertilizer, herbicide; defoliant for cotton plants; and pesticide. It is also used in the manufacture of dicyandiamide and calcium cyanide as a desulfurizer in the iron and steel industry; and in steel hardening.

Carcinogenicity

Calcium cyanamide was weakly mutagenic in Salmonella typhimurium strain TA1535 and nonmutagenic in strain TA100.

Shipping

UN1403 Calcium cyanamide with .1% calcium carbide, Hazard Class: 4.3; Labels: 4.3-Dangerous when wet material

Incompatibilities

Commercial grades of calcium cyanamide may contain calcium carbide; contact with any form of moisture solutions may cause decomposition, liberating explosive acetylene gas and ammonia. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides. May polymerize in water or alkaline solutions to dicyanamide. Contact with all solvents tested also causes decomposition

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Calcium cyanamide Suppliers

Ningxia lanbai black activated carbon co. LTD
Tel
86-951-6916117
Fax
86-951-6916137
Email
1151335606@qq.com
Country
China
ProdList
12
Advantage
58
J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
96815
Advantage
76
Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
18621169121
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
40310
Advantage
62
Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30159
Advantage
84
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386
Fax
021-67121385
Email
Sales-CN@TCIchemicals.com
Country
China
ProdList
24555
Advantage
81
Energy Chemical
Tel
021-58432009 400-005-6266
Fax
021-58436166
Email
sales8178@energy-chemical.com
Country
China
ProdList
43437
Advantage
61
Chengdu XiYa Chemical Technology Co., Ltd.
Tel
400-9903999
Fax
0539-6365991
Email
sale@xiyashiji.com
Country
China
ProdList
10078
Advantage
57
Sinopharm Chemical Reagent Co,Ltd.
Tel
86-21-63210123
Fax
86-21-63290778 86-21-63218885
Email
sj_scrc@sinopharm.com
Country
China
ProdList
9844
Advantage
79
Maya High Purity Chemicals
Tel
+86 (573) 82222445 (0)18006601000 QQ:452520369
Fax
+86 (573) 82222643
Email
sales@maya-r.com
Country
China
ProdList
11737
Advantage
57
Shanghai civi chemical technology co.,Ltd
Tel
86-21-34053660
Fax
86-21-34053661
Email
sale@labgogo.com
Country
China
ProdList
9886
Advantage
52
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View Lastest Price from Calcium cyanamide manufacturers

Hebei Guanlang Biotechnology Co., Ltd.
Product
Calcium cyanamide 156-62-7
Price
US $9.90/KG
Min. Order
1KG
Purity
99%
Supply Ability
5tons
Release date
2021-11-08
Zhuozhou Wenxi import and Export Co., Ltd
Product
Calcium cyanamide 156-62-7
Price
US $15.00-10.00/KG
Min. Order
1KG
Purity
99%+ HPLC
Supply Ability
Monthly supply of 1 ton
Release date
2021-08-11
Zhuozhou Wenxi import and Export Co., Ltd
Product
Calcium cyanamide 156-62-7
Price
US $15.00-10.00/KG
Min. Order
1KG
Purity
99%+ HPLC
Supply Ability
Monthly supply of 1 ton
Release date
2021-06-27

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