OSHA requires manufacturers to create a Material Safety Data Sheet for each chemical that they produce. MSDS's contain the chemical and trade names, as well as physical, safety, and health hazard data, emergency procedures, reactivity data, special protection information, and precautions for proper use. Caution should be used when reviewing MSDS's because they are sometimes incomplete, inaccurate, or difficult to interpret and read. Some MSDS's may report only limited information on human health effects as the result of acute exposure and may not provide supplemental information on the combined or synergistic effects of multiple chemical exposures. Further, MSDS's may not adequately address the adverse health effects of chronic or low-level exposure to the ingredients of the product formulation.