Simplified data from IEC 60079-20-1 covering properties of a selection of flammable gases.
| Name formula | Relative Density (Air=1) P | Flash point (°C) | Lower Flammable Limit (Vol -%) | Upper Flammable Limit (Vol -%) | Auto Ignition Temperature (°C) | MESG (mm) | MIC ratio | Temperature class | Equipment Group |
| Acetone | 2.0 | -20 | 2.5 | 14.3 at 100C° | 539 | 1.01 | 1.0 | T1 | IIA |
| Acetylene | 0.90 | Gas | 2.3 | 100 | 305 | 0.37 | 0.28 | T2 | IIC |
| Benzaldehyde | 3.66 | 64 | 1.4 | – | 192 | – | – | T4 | IIA |
| Benzene | 2.7 | -11 | 1.2 | 8.6 | 498 | 0.99 | 1.00 | T1 | IIA |
| Carbon Disulphide | 2.64 | -30 | 0.6 | 60 | 90 | 0.34 | 0.39 | T6 | IIC |
| Cyclohexane | 2.83 | -17 | 1.0 | 8.0 | 244 | 0.94 | – | T3 | IIA |
| Diethyl Ether | 2.55 | -45 | 1.7 | 39.2 | 175 | 0.87 | 0.88 | T4 | IIB |
| Ethylene | 0.97 | Gas | 2.3 | 36 | 440 | 0.65 | 0.63 | T2 | IIB |
| Gasoline | 3 | -46 | 1.4 | 7.6 | 280 | – | – | T3 | – |
| Hydrogen | 0.07 | Gas | 4.0 | 77 | 560 | 0.29 | 0.25 | T1 | IIC |
| Hydrogen Sulphide | 1.19 | Gas | 4.0 | 45.5 | 260 | 0.83 | – | T3 | IIB |
| Kerosene | – | 38 to 72 | 0.7 | 5.0 | 210 | – | – | T3 | IIA |
| Methane (fire damp) | 0.55 | Gas | 4.4 | 17 | 595 | 1.14 | – | T1 | I |
| Methanol | 1.11 | 8.0 | 6.0 | 36 at 60 C 50 at 100 C | 440 | 0.92 | 0.82 | T2 | IIA |
| Propane | 1.56 | Gas | 1.7 | 10.9 | 450 | 0.92 | 0.82 | T2 | IIA |
