Pyridine
Piridina · Пиридин · Pyridin · بيريدين · Piridin · Пиридин · Πυριδίνη · Piridina · پیریدین · פירידין · पिरिडीन · Piridin
| CAS | 110-86-1 |
|---|---|
| EC | 203-809-9 |
| UN | 1282 |
| Formula | C5H5N |
| Molar mass | 79.1 g/mol |
| LEL | 1.7 % vol |
| UEL | 12.4 % vol |
| Flash point | 18 °C |
| Autoignition temperature | 482 °C |
| Temperature class | T1 |
| Gas group | IIA |
| Relative density of the gas or vapour (air = 1) | 2.73 |
| GHS | Danger · H225, H302, H312, H332 |
Pyridine is an azaarene comprising a benzene core in which one -CH group is replaced by a nitrogen atom. It is the parent compound of the class pyridines. Pyridine appears as a clear colorless to light yellow liquid with a penetrating nauseating odor. Vapors are heavier than air. Toxic by ingestion and inhalation.