We are exposed to 500 chemicals a day Make sure all bottles are closed tightly Use chemicals in well ventilated areas Use protective equipment when necessary Most household chemicals contain a number of potentially dangerous chemicals Your nose doesn’t know: insecticides, plastics, PCBs or incinerator smoke Your nose does know: rotten egg smelling gas, ammonia, chlorine, formaldehyde, gasoline or diesel exhaust Airborne chemicals can make you befuddled, forgetful, worried, unsteady in walking, distressed breathing with shortness of breath and/or wheezing. Laboratory safety posters focus on safety issues that are important to safely conduct work in a laboratory environment.