Chemicals that pose health hazards are ones that are toxic, could cause cancer or reproductive problems, or could injure your lungs, skin, eyes, nose, or throat. These chemicals can get into the body when they soak through clothing and touch skin. There they can hurt your skin or be absorbed into the bloodstream. Chemicals can also be inhaled, enter the body through a cut or puncture in skin, or ingested with food. 

Labels on containers include pictograms to indicate if the chemical in the container is a health hazard.