Oxidizers such as chlorine, nitrogen dioxide and hydrogen peroxide are found in many of our laboratories. These symbols represent the class of materials that pose the greatest potential hazard to our life and health. The skull and cross bones identifies acutely toxic material. These materials can severely damage our health in a single overexposure. Fortunately, few of our work areas contain this type of material.
Examples are cyanide compounds, styrene.
This unique symbol identifies material that poses a threat to our health through long term exposure. Further, this material may be a suspected carcinogen or have other health damaging properties. Our labs, work areas and shops contain materials marked with symbol. When working with these materials, instruction must be provided. Very few areas of the University use or produce material marked with this symbol.