A chemical weapon is a type of weapon that uses toxic chemicals to harm or kill people, animals, or plants. These substances can cause severe injuries or death, and they can be dispersed in various ways, such as through gas, liquid, or solid forms. Chemical weapons are often classified into categories based on their effects, such as nerve agents, blister agents, and choking agents. The use of chemical weapons is prohibited under international law, specifically the Chemical Weapons Convention. This treaty aims to eliminate chemical weapons and prevent their development, production, and stockpiling. Countries that violate this agreement may face serious consequences, including sanctions or military action.