Gases - Dangerous Concentration Levels
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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