Nitrous oxide: your health not theirs.

Abstract

At long last the Health and Safety Executive are introducing an occupational exposure standard for nitrous oxide, enflurane, halothane and isoflurane. Fifteen years ago (1977) the National Institute of Occupational Safety and Health in the United States set a threshold limit for nitrous oxide at 25 parts per million (ppm) for an eight hour exposure. On the 1st January 1994 the British standard for nitrous oxide through the Health and Safety Executive will be 100 ppm for an eight hour exposure, four times higher than the American standard.