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Health hazard evaluation determination report: HHE-75-25-305 and HHE-75-163-305, Storage Technology Corporation, Inc., Louisville and Broomfield, Colorado, June 1976.
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HHE 75-25-305, HHE 75-163-305, 1976 Jun; :1-20
Exposure to N-methyldicyclohexylamine (7560830) (MCHA) was investigated at the Storage Technology Corporation (SIC-3573), Incorporated in Louisville and Broomfield, Colorado on October 13 and 14, 1975. Requests for the survey were made by company management from both facilities. Personal and area air samples were collected and analyzed for various metallic dusts and pyrolysis products, in addition to MCHA and methylene-bisphenyl-isocyanate (101688) (MDI). The employees provided medical histories and any symptomatic workers were given physical examinations and clinical tests. Employees were exposed to toxic concentrations of MCHA as evidenced by common symptoms of nausea, dizziness, coughs, dry mouths and lips, headaches, and eye watering. Unpleasant odors and residual tastes and eye, throat, and chest irritations also were reported by workers at the polyurethane foam operation. Some of the symptoms were not verifiable by medical examination. There were no abnormal blood counts or blood samples. All environmental samples for MDI were below the evaluation criteria of 0.2 milligrams per cubic meter. MCHA was not detected; no exposure standard exists for this compound. The author concludes that no hazard exists at these facilities. Recommendations are made to improve ventilation at vapor exhaust sites, to provide respirators, and to medically monitor employees involved with polyurethane processes.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; Computer-equipment; Hazard-Confirmed; Region-8; Electronic-equipment; Clinical-symptoms; Standards; Work-practices; Control-methods; Air-contamination; Air-sampling; Author Keywords: N-Methyldicyclohexylamine; MCHA; Bad Taste; Nausea; Dizziness; Mucous Membrane Irritation; Methylene Bisphenyl Isocyanate; MDI; Metals; Polyurethane Foam; Rosin Core Solder; Electroplating
Field Studies; Hazard Evaluation and Technical Assistance
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: May 5, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division