Cyanogen

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Cyanogen
Names
IUPAC name
Oxalonitrile
Other names
Bis(nitridocarbon)(C—C)
Carbon nitride
Cyanogen
Dicyan
Dicyanogen
Ethanedinitrile
Nitriloacetonitrile
Oxalic acid dinitrile
Oxalyl cyanide
Properties
C2N2
(CN)2
Molar mass 52.036 g/mol
Appearance Colorless gas
Odor Almond-like
Density 0.002321 g/cm3 (0 °C)
Melting point −28 °C (−18 °F; 245 K)
Boiling point −21.1 °C (−6.0 °F; 252.1 K)
45 g/100 ml (at 20 °C)
Solubility Soluble in diethyl ether, ethanol
Vapor pressure 5.1 atm (21 °C)
Thermochemistry
241.57 J·K−1·mol−1
309.07 kJ/mol
Hazards
Safety data sheet Matheson
Related compounds
Related compounds
Hydrogen cyanide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Cyanogen, also known as dicyanogen or oxalonitrile is a colorless, toxic gas with a pungent almond-like odor. It is a pseudohalogen, with the chemical formula (CN)2.

Properties

Chemical

Hydrolysis of cyanogen gives oxamide.

Physical

Cyanogen is a colorless gas, with an almond-like odor, highly poisonous. It is soluble in water, but more soluble in alcohols and ethers.

Availability

Cyanogen is sold by industrial gas companies, but due to its extreme dangers, it is not sold to the general public.

Preparation

Cyanogen can be produced by the pyrolysis of oxamide at 350 °C, which in turn can be obtained from the thermal decomposition of ammonium oxalate.

Projects

Due to the extreme toxicity of cyanogen, it's best to work with it only if you have experience working with toxic gaseous compounds. Work in well ventilated chambers or under a fumehood and proper protection equipment, such as cyanide-rated filter mask and gloves must be worn at all times.

  • Make oxamide
  • Make paracyanogen
  • Make the second hottest flame known to man

Handling

Safety

Dicyanogen is metabolized by the organism to cyanide, which is very toxic. Lethal dose through inhalation typically ranges from 100 to 150 mg. Inhalation of 900 ppm over a period of 10 minutes is considered lethal.

Storage

Cyanogen should only be stored in metal gas cylinders, away from light and heat, and preferably in an isolated place. Periodically inspect the tube for any signs of corrosion.

Disposal

Can be destroyed by bubbling it in an oxidizing solution. Burning it is not recommended as it may release hydrogen cyanide fumes.

References

Relevant Sciencemadness threads