What is the explosive range of Hydrogen sulfide (H2S)?

The explosive range of Hydrogen sulfide (H2S) is indeed from 4.3% to 45%. This range indicates the concentration of H2S in the air that can lead to combustion. When H2S is present in ambient air within this specified concentration, it can ignite and result in an explosion if an ignition source is introduced.

Understanding this explosive range is crucial for safety protocols in environments where H2S is present, such as in oil and gas operations, wastewater treatment facilities, and agricultural settings. Workers need to be aware of these concentrations to effectively manage risks associated with H2S, implementing appropriate monitoring and control measures to maintain levels outside the explosive range.

For comparison, the other options listed do not accurately reflect the known explosive limits for H2S. Maintaining awareness of the correct range is essential for preventing hazardous situations.