Material safety data sheets (MSDS) are designed to provide workers and emergency personnel with information about the proper procedures for handling or working with a particular substance. These sheets include information about the materials, such as physical data (melting point, boiling point, flash point, and so forth), toxicity, health effects, first-aid treatment, reactivity, storage, disposal, protective equipment, and spill or leak procedures. This information is particularly important after a spill or other accident. The sheets can be requested from wood treatment firms or from chemical suppliers. A partial list of chemical suppliers and wood treatment firms is included in the section on Web sites.