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Occupational Exposure to Diacetyl and 2,3-Pentanedione
Diacetyl and its substitute, 2,3-pentanedione, are widely used as flavoring compounds. The National Institute for Occupational Safety and Health (NIOSH) objective in establishing recommended exposure limits (RELs) for diacetyl and 2,3-pentanedione is to reduce the risk of respiratory impairment (decreased lung function) and the severe irreversible lung disease obliterative bronchiolitis associated with occupational exposure. In this Criteria Document, NIOSH reviews the scientific literature concerning potential health effects, toxicology, and risk assessment pertaining to diacetyl and 2,3-pentanedione...
Respiratory morbidity in a coffee processing workplace with sentinel obliterative bronchiolitis cases
Rationale: Obliterative bronchiolitis in former coffee workers prompted a cross-sectional study of current workers. Diacetyl and 2,3-pentanedione levels were highest in areas for flavoring and grinding/packaging unflavored coffee. Methods: We interviewed 75 (88%) workers, measured lung function, and created exposure groups based on work history. We calculated standardized morbidity ratios (SMRs) for symptoms and spirometric abnormalities. We examined health outcomes by exposure groups. Results: SMRs were elevated 1.6-fold for dyspnea and 2.7-fold for obstruction. The exposure group working in both...
Respiratory symptoms and lung function abnormalities related to work at a flavouring manufacturing facility
Objectives: To better understand respiratory symptoms and lung function in flavouring manufacturing workers. Methods: We offered a questionnaire and lung function testing to the current workforce of a flavouring manufacturing facility that had transitioned away from diacetyl and towards substitutes in recent years. We examined symptoms, spirometric parameters and diffusing capacity measurements by exposure variables, including facility tenure and time spent daily in production areas. We used linear and logistic regression to develop final models adjusted for age and smoking status. Results: A total...

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