ILO Home
Go to the home page
Site map | Contact us Français | Español

CISDOC database

Document ID (ISN)104397
CIS number 05-637
ISSN - Serial title 0731-3810 - Journal of Toxicology - Clinical Toxicology
Year 2005
Convention or series no.
Author(s) Kubota T., Miyata A.
Title Acute inhalational exposure to chlorodifluromethane (Freon 22): A report of 43 cases
Bibliographic information 2005, Vol.43, No.4. p.305-308. Illus. 13 ref.
Abstract 43 cases of chlorodifluoromethane (Freon-22) intoxication occurred when a freezer in a seafood factory exploded. In this accident, 80 workers were exposed to Freon-22 gas and 43 workers developed symptoms and were hospitalized. Neurological symptoms including dizziness, headache, and nausea were the most frequently observed (40 of 43 patients). One patient was comatose but recovered within one hour with oxygen inhalation. Airway and respiratory symptoms including dysesthesia of the tongue, pharyngitis, and shortness of breath were also frequently observed (26 of 43 patients). These symptoms disappeared within a few days in all patients. There were no fatalities. Although Freon-22 has been considered to be a chlorofluorocarbon of relatively low toxicity, this incident suggests that potentially significant toxic effects may occur following large exposures.
Descriptors (primary) toxic effects; Japan; cold storage; food industry; chlorodifluoromethane
Descriptors (secondary) neurotoxic effects; poisoning; case study; migraine; short-term exposure; functional digestive disorders; unconsciousness; vertigo; symptoms
Document type D - Periodical articles
Country / State or ProvinceJapan
Subject(s) Toxic and dangerous substances
Broad subject area(s) Chemical safety
Browse category(ies) Food industry
Halogenated hydrocarbons
Storage and warehousing