Chlorine gas is an inorganic gas, polemic for being used as chemical weapons, it is mostly used in controlled quantities in chemical industry.
| Chemical formula | Cl2 |
| Molecular weight | 70.906 g/mol |
| Density | 3.2 g/lt |
| Melting point | -101.5 °C |
| Boiling point | -34.038°C |