August 1, 1984 Robert A. Wiesboeck, Manager Atlanta Technical Center USS, Agri-Chemicals, Division of United States Steel Corporation 685 Dekalb Industrial Way Decatur, Georgia 30033 Dear Mr. Wiesboeck: This is in response to your inquiry dated June 22, concerning the completion of Material Safety Data Sheets (MSDS), under the Occupational Safety and Health Administration's (OSHA) Hazard Communication standard (29 CFR 1910.1200) for products that are composed of a mixture of non-interacting chemicals. For such products, you propose that component chemical MSDS be attached to a cover sheet identifying the mixture product and listing all constituents. This approach is acceptable as long as the hazards associated with the mixture are not different from that of its components. Please contact us if further assistance is needed. Sincerely, John B. Miles, Jr., Director Directorate of Field Operations

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June 22, 1984 Mr. John Miles Director Field Operations OSHA 200 Constitution Avenue, N.W. Room N-3603 Washington, D.C. 20210 Dear Mr. Miles: Recently Ms. J. Silk of your office was helpful in clarifying for me a requirement of the OSHA Hazard Communication Act as it applies to mixtures. The question was whether MSDS's for non-interacting mixtures of OSHA hazardous materials can be prepared by composing a cover sheet listing the hazardous and nonhazardous components, and attaching the manufacturers MSDS for the hazardous materials as shown on the attached sample. It is understood that this can be done only for non-interacting materials. Please respond to the proposal in question by letter to give me a copy for my file. Your prompt answer is greatly appreciated. Very truly yours, USS AGRI-CHEMICALS Robert A. Wiesboeck Manager Atlanta Technical Center

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