October 22, 2013 - The Environmental Protection Agency has issued a final rule that identified 2,3,3,3-tetrafluoropropene (also known as HFO-1234yf) as a chemical compound that will no longer be regulated as a VOC under the Clean Air Act. This will remove it from regulatory requirements related to controlling VOC emissions in order to meet the ozone NAAQS. EPA will add HFO-1234yf to the list of negligibly reactive compounds in EPA’s regulatory definition of VOC.

• Final Rule (PDF)(18 pp, 111 K, About PDF) - Federal Register - Oct 22, 2013
• Docket No. EPA-HQ-OAR-2007-0089 contains the proposed rule, final rules, public comments, and supporting documents.

• Fact Sheet: Final Rule to Exclude 2,3,3,3-Tetrafluoropropene From Control as A Volatile Organic Compound (VOC) (PDF)(2 pp, 19 K, September 19, 2013)