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Dangerous vs. tolerable concentration levels for some industrial gases.
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
- Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more.
- Risk, reliability and safety in process control systems.
- Ammonia and health symptoms - smell and threat to life.
- CO2 acceptance and comfort level.
- Chemical, Physical and Thermal Properties of Carbon Monoxide - CO.
- Exposure to Carbon Monoxide - CO and health effects.
- Exhaust ventilation from garages and workshops.
- Densities and molecular weights of common gases like acetylene, air, methane, nitrogen, oxygen and others.
- Flame and explosion limits for gases like propane, methane, butane, acetylene and more.
- The flash point of a chemical indicates how easy it may ignite and burn.
- European hazardous area classification with zones, protection types, temperature codes and codes.
- North American hazardous locations classification with classes, divisions and groups
- Age and life expectancy for men and women.
- American National Standards Institutes schedule for safety colors marking physical hazards.
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