Chemical, gas, and hazardous material signs call attention to areas with dangerous substances so personnel can avoid contact or exposure that can lead to eye or skin irritation, burns, or respiratory issues. Biohazard signs warn of nearby biological waste or harmful toxins. Chemical hazard and storage signs denote areas where chemicals are used or stored. Cylinder signs point out where gas cylinders are kept. Emergency shower and eye wash station signs direct workers to where they can wash off hazardous chemicals after exposure. Flammable material signs indicate items that could ignite if a spark is present. Hazardous atmosphere signs denote areas that are dangerous for workers to enter while hazardous waste signs deter unauthorized personnel from entering areas where hazardous waste is present.