Properties of Cyanogen (C2N2)
Cyanogen is a chemical compound with the molecular formula (C2N2). It is a highly toxic and flammable gas at room temperature, and can react violently with various substances. Cyanogen is often used in chemical research and industrial processes, but its handling requires strict safety precautions due to its hazardous properties.
The following table provides a comprehensive list of cyanogen properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Molar Mass | 52.035 g/mol |
| Density (0°C) | 2.335 kg/m3 |
| Dynamic Viscosity (25°C) | 14.4 µPa·s |
| Thermal Properties | Metric |
| Melting Point | -27.8 °C |
| Boiling Point | -21.1 °C |
| Thermal Conductivity (25°C) | 0.0281 W/m·K |
| Specific Heat Capacity (Cp) | 1121 J/kg·K |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 126.7 °C |
| Critical Pressure (Pc) | 6.3 MPa |
| Critical Density (ρc) | 360 kg/m3 |
| Optical Properties | Metric |
| Refractive Index (589 nm) | 1.000834 |
| Hazardous Data | Metric |
| Autoignition Temperature | 850 °C |
| Lower Flammability Limit | 3.9% |
| Upper Flammability Limit | 36.6% |
| NFPA Rating (Health) | 4 |
| NFPA Rating (Fire) | 4 |
| NFPA Rating (Reactivity) | 1 |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)
Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Fire Protection Guide to Hazardous Materials, 14th Edition. United States: National Fire Protection Association, 2010.