The Elements: Chlorine

Chlorine is a versatile element with both harmful and beneficial properties. At high concentrations, it is a poisonous gas used historically as a weapon. However, at lower concentrations, it is safe for humans and is used to disinfect swimming pools and treat drinking water. Chlorine is also a key component in cleaning products like bleach. In nature, it is mostly found as sodium chloride, or salt, making up a significant part of ocean mass. Within the human body, chlorine plays a crucial role in fluid regulation, digestion, and immune response. Despite its potential dangers, chlorine is essential for life.

What role does chlorine play in the human body?

Why is chlorine considered essential for life despite its poisonous nature in gas form?