Gases - Dangerous Concentration Levels

Dangerous vs. tolerable concentration levels for some industrial gases.

Gas	Gas Concentration (⁰/₀₀)
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

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Gases - Dangerous Concentration Levels

Dangerous vs. tolerable concentration levels for some industrial gases.

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Scientific Online Calculator

Gas	Gas Concentration (⁰/₀₀)
Gas	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