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Dangerous vs. tolerable concentration levels for some industrial gases.
|Gas||Gas Concentration (0/00)|
|Tolerable > 1 hour||Tolerable < 1 hour||Immediately Dangerous|
|Ammonia ||0.1 ||0.3 ||3.5 |
|Bromine Vapor ||0.001 ||0.004 ||0.05 |
|Carbon Dioxide ||10 ||30 ||40 |
|Carbon Monoxide ||0.2 ||0.5 ||2.0 |
|Chlorine Vapor ||0.001 ||0.004 ||0.05 |
|Hydrochloric Acid ||0.01 ||0.05 ||1.5 |
|Hydrogen Sulphide || ||0.2 ||0.6 |
|Iodine Vapor ||0.0005 ||0.003 ||0.05 |
|Sulphuric Acid || ||0.05 ||0.5 |
- 1 ppm = 10-6 = 0.0001 o/o = 0.001 o/oo
- 1 o/oo = 1000 ppm
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This page can be cited as
- Engineering ToolBox, (2012). Gases - Dangerous Concentration Levels. [online] Available at: https://www.engineeringtoolbox.com/gases-dangerous-levels-d_1841.html [Accessed Day Mo. Year].
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