Hydrogen Sulfide (H2S)

• Sewer gas, stink gas (rotten eggs)

• Produce olfactory fatigue (loss of sense of smell)

• Odor threshold: 0.02-0.2 ppm

• Colorless, flammable gas

• LEL = 4.3% UEL = 46.0%

• Heavier than air

• Vapor density (1.18)

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