What is the lowest ignition temperature of Hydrogen sulfide (H2S)?

The lowest ignition temperature of Hydrogen sulfide (H2S) is indeed approximately 655 degrees Fahrenheit. This temperature is significant because it represents the point at which H2S can ignite in air, potentially leading to combustion and pose serious safety risks in environments where it is present. Understanding the ignition temperature is crucial for safety practices in industrial settings, as it helps in determining appropriate measures for handling and storing this hazardous material.

Awareness of H2S and its ignition properties is essential for foremen and safety personnel to ensure a safe working environment. The values provided in the other options fall below the documented ignition temperature for H2S, making them incorrect. The accurate identification of this temperature aids in the implementation of safety protocols and in mitigating risk factors associated with flammable gases.