The chemical element known for its sharp smell and used in cleaning products is chlorine. Chlorine is a greenish-yellow gas at room temperature, and its strong, pungent odor is easily recognizable. It is widely used in disinfectants and cleaning agents, particularly in water treatment processes to kill bacteria, viruses, and other pathogens. Chlorine compounds, such as sodium hypochlorite, are commonly found in household bleach. While effective as a disinfectant, chlorine must be handled with care due to its corrosive nature and potential health hazards when inhaled or ingested in concentrated forms.