Diacetyl (also called butanedione or 2,3-butanedione) is a natural byproduct of
fermentation and is also synthesized by chemical manufacturers. Diacetyl gives
butter and certain food flavorings a distinctive buttery flavor and aroma.
Food flavorings containing diacetyl are used in microwave popcorn and other
snack foods, pet foods, candies, baked goods, and other food products.
To address concerns regarding diacetyl exposure in the workplace, the US
Department of Labor's Occupational Safety and Health Administration's (OSHA)
announced it has taken the following three actions:(1) Initiated a
rulemaking;(2) Issued a Safety and Health Information Bulletin; and (3)
Provided Hazard Communication Guidance. These actions build upon the National
Emphasis Program, announced in April 2007, focusing on health hazards resulting
from exposure to microwave popcorn butter flavorings containing diacetyl.
AplusA-online.de - Source: U.S. Department of Labor Occupational Safety & Health Administration