How many times heavier than air is chlorine gas?

Chlorine gas is approximately 2.5 times heavier than air. This is important to understand because the weight of gases can significantly impact their behavior in the environment. Chlorine, being heavier than air, tends to accumulate at lower levels and can create localized concentrations that may pose safety and health hazards.

When assessing the weight of gases, it is calculated based on the molecular weight of the gas compared to the average molecular weight of air, which is about 29 g/mol. Chlorine (with a molecular weight of approximately 70.9 g/mol) will settle closer to the ground when released, which can lead to dangerous situations in enclosed or low-lying areas if not properly ventilated.

This property is critical for water operators and those working around chemicals, as safety protocols and emergency response strategies must consider how gases behave in various conditions.