Chemical hazards can occur when employees are exposed to chemicals in solid, liquid, or gas form through inhalation, skin contact, or ingestion. Examples of chemical hazards include vapors, fumes, mists, gases, and liquids from cleaning products, solvents, carbon monoxide, gasoline, and other flammable materials. To prevent chemical hazards, employers should require protective equipment like gloves, masks, eye wear, and clothing for employees who come into contact with harmful chemicals, especially those working in manufacturing or laboratory settings.