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460-19-5

460-19-5 structural image
Product Name: CYANOGEN
Formula: C2N2
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Cyanogen appears as a colorless gas with an odor of almonds. Freezes at -28 °C and boils at -20.7 °C. Shipped as a liquid confined under its vapor pressure. The gas is heavier than air and a flame can travel back to the source of leak very easily. Prolonged exposure to fire or intense heat may cause the containers to violently rupture and rocket. Used to make other chemicals, as a fumigant, and as a rocket propellant.
Color/Form Colorless gas; burns with purple tinged flame
Odor Almond-like odor, which is acrid and pungent in lethal concentrations
Boiling Point -6.1 °F at 760 mmHg (USCG, 1999)
Melting Point -18.2 °F (USCG, 1999)
Flash Point Flammable gas
Solubility 1 % (NIOSH, 2023)
Density 0.954 at -5.8 °F (USCG, 1999) - Less dense than water; will float
Vapor Density 1.82 (NIOSH, 2023) - Heavier than air; will sink (Relative to Air)
Vapor Pressure 5.1 atm at 70 °F (NIOSH, 2023)
LogP log Kow = 0.07
Decomposition ... When heated to decomposition ... it will ... produce highly toxic fumes.
Heat of Combustion 258.3 kgcal/gmole @ 20 °C (gas)
Heat of Vaporization 5.778 kcal/mole (liquid)
Ionization Potential 13.57 eV
Polymerization Polymerization may be caused by elevated temperature, oxidizers, peroxides, or sunlight. Insoluble paracyanogen polymer may form in vents and other confined spaces.
Odor Threshold Odor threshold is >250 ppm
Refractive Index Index of refraction: 1.327 @ 18 °C (liq)
Kovats Retention Index 259.2
Other Experimental Properties CONVERSION FACTORS: 1 MG/L= 469.6 PPM & 1 PPM= 2.127 MG/CU M @ 25 °C, 760 MM HG
Chemical Classes Nitrogen Compounds -> Nitriles

COMPUTED DESCRIPTORS

Molecular Weight 52.03 g/mol
XLogP3 0.1
Hydrogen Bond Donor Count 0
Hydrogen Bond Acceptor Count 2
Rotatable Bond Count 0
Exact Mass 52.006148008 g/mol
Monoisotopic Mass 52.006148008 g/mol
Topological Polar Surface Area 47.6 Ų
Heavy Atom Count 4
Formal Charge 0
Complexity 71.1
Isotope Atom Count 0
Defined Atom Stereocenter Count 0
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Cyanogen appears as a colorless gas with an odor of almonds. Freezes at -28 °C and boils at -20.7 °C. Shipped as a liquid confined under its vapor pressure. The gas is heavier than air and a flame can travel back to the source of leak very easily. Prolonged exposure to fire or intense heat may cause the containers to violently rupture and rocket. Used to make other chemicals, as a fumigant, and as a rocket propellant.