Minimum ignition charge
The minimum ignition charge (MZQ) describes the ignition sensitivity of a medium, in the actual sense of a flammable substance such as a gas, a liquid or a solid, to discharges of static electricity. It is mainly used for assessing discharges from plastics .
In the "Technical Rules for Hazardous Substances - Avoidance of Ignition Hazards Due to Electrostatic Charges" (TRGS 727, Appendix G), the following minimum ignition charges and minimum ignition energies are listed.
| connection |
Minimum ignition energy (mJ) |
Minimum ignition charge (nC) |
Most readily ignitable mixture (vol .-%) |
Explosion group according to IEC 60079-0 |
|---|---|---|---|---|
| acetaldehyde | 0.38 | - | - | IIA |
| acetone | 0.55 | 127 | 6.5 | IIA |
| Acrylonitrile | 0.16 | - | 9.0 | IIB |
| ammonia | 14th | 1500 | 20th | IIA |
| benzene | 0.20 | 45 | 4.7 | IIA |
| 1,3-butadiene | 0.13 | - | 5.2 | IIB |
| butane | 0.25 | 60 | 4.7 | IIA |
| 2-butanone | 0.27 | - | 5.3 | IIA |
| Cyclohexane | 0.22 | - | 3.8 | IIA |
| Cyclopropane | 0.17 | - | 6.3 | IIB |
| 1,2-dichloroethane | 1.0 | - | 10.5 | IIA |
| Dichloromethane | 9,300 | 880,000 | 18th | IIA |
| Diethyl ether | 0.19 | 40 | 5.1 | IIB |
| 2,2-dimethylbutane | 0.25 | 70 | 3.4 | IIA |
| Ethyl acetate | 0.46 | 120 | 5.2 | IIA |
| Ethane | 0.25 | 70 | 6.5 | IIA |
| Ethanol | 0.28 | 60 | 6.4 | IIB |
| Ethene | 0.082 | 32 | 8.0 | IIB |
| Ethine | 0.019 | - | 7.7 | IIC |
| Ethylene oxide | 0.061 | - | 10.8 | IIB |
| Heptane | 0.24 | 60 | 3.4 | IIA |
| Hexane | 0.24 | 60 | 3.8 | IIA |
| methane | 0.28 | 70 | 8.5 | IIA |
| Methanol | 0.20 | 50 | 14.7 | IIA |
| 2-methylbutane | 0.21 | 63 | 3.8 | IIA |
| Methylcyclohexane | 0.27 | 70 | 3.5 | IIA |
| Pentane | 0.28 | 63 | 3.3 | IIA |
| cis-2-pentene | 0.18 | - | 4.4 | IIB |
| trans-2-pentene | 0.18 | - | 4.40 | IIB |
| propane | 0.25 | 70.00 | 5.20 | IIA |
| 1-propyne | 0.11 | - | 6.50 | IIB |
| Propylene oxide | 0.13 | - | 7.50 | IIB |
| Carbon disulfide | 0.01 | - | 7.80 | IIC |
| Tetrafluoroethene | 4.10 | - | - | IIA |
| Tetrahydro-2H-pyran | 0.22 | 60.00 | 4.70 | IIA |
| 1,1,1-trichloroethane | 4,800 | 700,000 | 12.00 | IIA |
| Trichlorethylene | 510.00 | 150,000 | 26.00 | IIA |
| hydrogen | 0.02 | 12.00 | 22.00 | IIC |
Individual evidence
- ↑ Ignition hazards due to electrostatic charges: Fundamentals of electrostatics; Information on the implementation of TRBS 2153 with wording . ecomed-Storck, 2009, ISBN 978-3-609-61870-8 , p. 40 ( books.google.de ).
- ↑ BAuA - TRGS 727 Avoidance of ignition hazards due to electrostatic charges / Technical rules for hazardous substances (TRGS) / Hazardous substances / Topics from AZ / Federal Institute for Occupational Safety and Health. Retrieved March 23, 2017 . , Version July 29, 2016