Vinyl Fluoride-Industrial Hygiene Survey Report, E. I. duPont de Nemours and Co., Inc., Louisville, Kentucky.
NIOSH 1977 Oct:18 pages
An industrial hygiene survey was made of vinyl-fluoride (75025) (VF) production at E. I. duPont de Nemours and Company, Incorporated, Louisville, Kentucky, (SIC-2869). The survey was conducted on May 31 to June 1, 1977. The manufacturing process, medical and industrial hygiene programs, air sampling techniques, and analytical procedures were investigated. VF was manufactured by a pressurized reaction between hydrofluoric-acid (7664393) and acetylene (74862). A difluoroethane (75376) intermediate was broken down to vinyl- fluoride and hydrofluoric-acid. Process materials were totally enclosed. About 39 of the 1400 workers at the facility were involved in VF production, with an average of 3 years in the production area at the time of the survey. Personal monitoring was done every 3 months. Operators wore respirators with canisters capable of removing organic vapors when working in the processing area. Area and personal air samples were collected during the survey and analyzed by gas chromatography. Previous analyses indicated an average exposure of 0.55 parts per million (ppm) VF with a high of 2.2ppm (time weighted averages). Survey analysis indicated exposure to less than 2ppm VF and less than 3 to 5ppm difluoroethane. The personal sampler of one operator collected 21ppm VF during production startup. The operator was protected with a respirator and protective clothing. The author concludes that operational procedures were consistent with good practice and adequate in preventing adverse health effects.
NIOSH-Author; NIOSH-Survey; Field-study; Chemical-industry-workers; Chemical-properties; Industrial-medicine; Analytical-methods; Chromatographic-analysis; Air-sampling; Occupational-exposure; Field-Study; Region-4;
75-02-5; 7664-39-3; 74-86-2; 75-37-6;
Division of Field Studies and Clinical Investigation, NIOSH, Center for Disease Control, Public Health Service, U.S. Department of Health, Education, and Welfare, Cincinnati, Ohio, 18 pages, 6 references