Information on the hazards of ethylene-dibromide (106934) (EDB) exposure is reviewed. The production and use of EDB is discussed and exposure standards and guidelines proposed by OSHA, NIOSH, the American Conference of Governmental Industrial Hygienists, and by the California's Division of OSHA are included. Data also is provided on the magnitude of occupational EDB exposure. The results of carcinogenicity tests in laboratory animals, epidemiologic studies of exposed workers, and mutagenicity tests in Drosophila- melanogaster are summarized. The author concludes that EDB is a potential human carcinogen, and recommends a maximum workplace exposure limit of 0.13 part per million.