Cyanogen chloride

Cyanogen chloride is a highly toxic chemical compound with the formula CNCl. This linear, triatomic pseudohalogen is an easily condensed colorless gas. More commonly encountered in the laboratory is the related compound cyanogen bromide, a room-temperature solid that is widely used in biochemical analysis and preparation.

Cyanogen chloride
Names
Preferred IUPAC name
Carbononitridic chloride
Systematic IUPAC name
Chloroformonitrile
Other names
  • Chlorine cyanide
  • Cyanic chloride
  • Chlorocyanogen
  • Chlorcyan
  • Chlorocyanide
Identifiers
3D model (JSmol)
Abbreviations CK
ChemSpider
ECHA InfoCard 100.007.321
EC Number
  • 208-052-8
MeSH cyanogen+chloride
RTECS number
  • GT2275000
UNII
UN number 1589
  • InChI=1S/CClN/c2-1-3 Y
    Key: QPJDMGCKMHUXFD-UHFFFAOYSA-N Y
  • ClC#N
Properties
CNCl
Molar mass 61.470 g mol−1
Appearance Colorless gas
Odor acrid
Density 2.7683 mg mL−1 (at 0 °C, 101.325 kPa)
Melting point −6.55 °C (20.21 °F; 266.60 K)
Boiling point 13 °C (55 °F; 286 K)
soluble
Solubility soluble in ethanol, ether
Vapor pressure 1.987 MPa (at 21.1 °C)
-32.4·10−6 cm3/mol
Thermochemistry
236.33 J K−1 mol−1
137.95 kJ mol−1
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Highly toxic; forms cyanide in the body
GHS labelling:
Danger
NFPA 704 (fire diamond)
4
0
2
Flash point nonflammable
NIOSH (US health exposure limits):
PEL (Permissible)
 none
REL (Recommended)
 C 0.3 ppm (0.6 mg/m3)
IDLH (Immediate danger)
 N.D.
Safety data sheet (SDS) inchem.org
Related compounds
Related alkanenitriles
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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