The lowest concentration of a substance in air that can be smelled. OSHA, Federal Occupational Safety and Health Administration, an agency in the U.S. Department of Labor which establishes workplace safety and health regulations. Many states, including California, have their own OSHA programs. For example, a pH of 1 indicates a strongly acidic solution, a pH of 7 indicates a neutral solution, and a pH of 14 indicates a strongly alkaline solution. A hazardous polymerization is a reaction that occurs at a fast rate, and releases large amounts of energy.
Many monomers are hazardous in the liquid and vapor states, but form much less hazardous polymers.
Ppb is one thousand times smaller than ppm. PELs and TLVs are often expressed in ppm. A unit of pressure. At sea level, the earth's atmosphere exerts 14.7 psi. Pulmonary Edema Filling of the lungs with fluid, which produces coughing and difficulty breathing.