THIS BULLETIN, ONE OF A SERIES ON SAFETY IN INDUSTRY, IS INTENDED TO PROVIDE THE BACKGROUND WHICH WILL ENABLE THE SAFETY MAN TO UNDERSTAND SOME OF THE PRINCIPLES APPLIED IN CONTROLLING CHEMICAL HAZARDS. IT WAS PREPARED IN THE OFFICE OF OCCUPATIONAL SAFETY, DIVISION OF PROGRAMING AND RESEARCH, BUREAU OF LABOR STANDARDS. TOPICS INCLUDE (1) WHAT IS CHEMISTRY, (2) DEFINITION AND PROPERTIES OF MATTER, (3) DESCRIPTION AND CHARACTERISTICS OF SOME IMPORTANT CHEMICALS, (4) FLAMMABLE AND COMBUSTIBLE LIQUIDS, AND (5) DETERMINING THE PROPERTIES OF CHEMICALS. THE DOCUMENT SIZE IS 6 BY 9 INCHES. IT IS ALSO AVAILABLE AS GPO NUMBER L16.3--222 FOR 15 CENTS FROM THE SUPERINTENDENT OF DOCUMENTS, U.S. GOVERNMENT PRINTING OFFICE, WASHINGTON, D.C. 20402. (PS)