The chlorine jugs are often made from high-density polyethylene (HDPE) plastic, which is naturally white in color. However, the yellow color of these jugs is intentionally added during the manufacturing process for safety reasons.

Chlorine gas is toxic and can be harmful if inhaled or comes into contact with the skin. The bright yellow color of the chlorine jugs acts as a visual warning, helping to identify and distinguish them from other containers or jugs, especially in hazardous environments.

The yellow color serves as an immediate visual cue for individuals working with or around chlorine to take necessary precautions, such as wearing proper safety gear, ensuring adequate ventilation, and handling chlorine with care. It helps prevent accidental exposure or confusion with other substances, thereby enhancing safety in workplaces where chlorine is used or stored.