November 7, 2016
Washington – NIOSH has released recommended limits for controlling occupational exposure to flavoring chemicals diacetyl and 2,3-pentanedione, both of which have been linked to reduced lung function in food flavoring and production industry workers.
Published Oct. 31, Criteria for a Recommended Standard: Occupational Exposure to Diacetyl and 2,3-Pentanedione lists the recommended exposure limits for diacetyl at 5 parts per billion and 9.3 ppb for 2,3-pentanedione as an 8-hour time-weighted average during a 40-hour workweek. NIOSH stated that the limit for 2,3-pentanedione is higher because of “analytical method limitations.” For short-term exposures, the REL is 25 ppb for diacetyl and 31 ppb for 2,3-pentanedione in a 15-minute time span.
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