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DOL/OSHA RIN: 1218-AC33 Publication ID: Spring 2011 
Title: Occupational Exposure to Food Flavorings Containing Diacetyl and Diacetyl Substitutes 
Abstract: On July 26, 2006, the United Food and Commercial Workers International Union (UFCW) and the International Brotherhood of Teamsters (IBT) petitioned DOL for an Emergency Temporary Standard (ETS) for all employees exposed to diacetyl, a major component in artificial butter flavoring. Diacetyl and a number of other volatile organic compounds are used to manufacture artificial butter food flavorings. These food flavorings are used by various food manufacturers in a multitude of food products including microwave popcorn, certain bakery goods, and some snack foods. Evidence indicates that exposure to flavorings containing diacetyl is associated with adverse effects on the respiratory system, including bronchiolitis obliterans, a debilitating and potentially fatal lung disease. OSHA denied the petition on September 25, 2007, but has initiated 6(b) rulemaking. OSHA published an Advanced Notice of Proposed Rulemaking (ANPRM) on January 21, 2009, but withdrew the ANPRM on March 17, 2009, in order to facilitate timely development of a standard. The Agency subsequently initiated review of the draft proposed standard in accordance with the Small Business Regulatory Enforcement Fairness Act (SBREFA). The SBREFA Panel Report was completed on July 2, 2009. NIOSH is currently developing a criteria document on occupational exposure to diacetyl. The criteria document will also address exposure to 2,3-pentanedione, a chemical that is structurally similar to diacetyl and has been used as a substitute for diacetyl in some applications. It will include an assessment of the effects of exposure as well as quantitative risk assessment. OSHA intends to rely on these portions of the criteria document for the health effects analysis and quantitative risk assessment for the Agency's diacetyl rulemaking. NIOSH will initiate public peer review of the criteria document in April, 2011. 
Agency: Department of Labor(DOL)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Prerule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 29 CFR 1910   
Legal Authority: 29 USC 655(b)    29 USC 657   
Legal Deadline:  None
Timetable:
Action Date FR Cite
Stakeholder Meeting  10/17/2007  72 FR 54619   
ANPRM  01/21/2009  74 FR 3937   
ANPRM Withdrawn  03/17/2009  74 FR 11329   
ANPRM Comment Period End  04/21/2009    
Completed SBREFA Report  07/02/2009    
Initiate Peer Review of Health Effects and Risk Assessment  06/00/2011    
End Peer Review  07/00/2011    
Regulatory Flexibility Analysis Required: Yes  Government Levels Affected: None 
Small Entities Affected: Businesses  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: Yes 
Agency Contact:
Dorothy Dougherty
Director, Directorate of Standards and Guidance
Department of Labor
Occupational Safety and Health Administration
Room N-3718, FP Building, 200 Constitution Avenue NW.,
Washington, DC 20210
Phone:202 693-1950
Fax:202 693-1678
Email: dougherty.dorothy@dol.gov