500 °F at 760 mmHg (Decomposes) (NIOSH, 2024)
140 °C at 19 mm Hg
Boiling point at 19 mm Hg is 140 °C
at 0.067kPa: 83 °C
500 °F (decomposes)
Density
1.28 (NIOSH, 2024) - Denser than water; will sink
1.282 g/cu cm at 20 °C
Relative density (water = 1): 1.28
1.28
Physical Description
Cyanamide appears as colorless deliquescent crystals. Mp: 45 °C; bp: 260 °C. Density: 1.282 g cm-3. Quite soluble in water (77 g / 100 g solution at 15 °C). Soluble in butanol, methyl ethyl ketone, ethyl acetate, alcohols, phenols, amines, ethers. Note: The term "cyanamide" is also used to refer to the important compound calcium cyanamide, which is a different chemical.
Liquid
Deliquescent, crystalline solid; [CHEMINFO]
COLOURLESS HYGROSCOPIC DELIQUESCENT CRYSTALS.
Crystalline solid.
Appearance
Orthorhombic, elongated, six-sided tablets from dimethyl phthalate
Crystallizes from a variety of solvents as somewhat unstable, colorless, orthorhombic, deliquescent crystals.
Deliquescent crystals
Cyanamide forms colorless, orthorhombic crystals or long transparent needles (from water), large platelike crystals when allowed to crystallize spontaneously from water, and crystals from dimethyl phthalate solution.