The most recently issued VOC Exemption Rules are listed below, with links to fact sheets and additional information.  View a complete list of VOC Exemption Rules.

Exclusion of cis-1,1,1,4,4,4-hexafluorobut-2-ene (HFO-1336mzz-Z)

November 16, 2018 - EPA added HFO-1336mzz-Z to the list of compounds excluded from the regulatory definition of volatile organic compounds or VOC. Evidence shows that HFO 1336mzz-Z is negligibly reactive in forming ground-level ozone. This action will allow states to remove regulatory controls on HFO-1336mzz-Z that are part of State Implementation Plans designed to help meet the ground-level ozone standards. HFO-1336mzz-Z is used in a variety of applications as a replacement for foam expansion or blowing agents. Learn More

Exclusion of HFE-347pcf2

July 20, 2016 - EPA added 1,1,2,2-Tetrafluoro-1-(2,2,2-trifluoroethoxy) ethane (also known as HFE-347pcf2; CAS number 406-78-0) to the list of compounds excluded from the regulatory definition of VOC.  Evidence shows that HFE-347pcf2 is negligibly reactive in forming ground-level ozone. This action will allow states to remove regulatory controls on HFE-347pcf2 that are part of State Implementation Plans designed to help meet the ground-level ozone standards. HFE-347pcf2 is used in a variety of applications as a replacement for precision cleaning.  Learn More

Remove Requirements for t-Butyl Acetate (TBAC)

February 25, 2016 - The regulatory definition of VOC excludes t-butyl acetate (also known as tertiary butyl acetate or TBAC; CAS Number: 540-88-5) for purposes of VOC emissions limitations or VOC content requirements on the basis that it makes a negligible contribution to tropospheric ozone formation.  This action removed remaining Clean Air Act volatile organic compound (VOC) requirements for t-Butyl Acetate (TBAC).    Learn More

Exclusion of 2-Amino-2-Methyl-1-Propanol 

March 27, 2014 - EPA added 2-Amino-2-methyl-1-propanol (also known as AMP, CAS124-68-5) to the list of compounds excluded from the regulatory definition of VOC.  Evidence shows that AMP is negligibly reactive in forming ground-level ozone. This action will allow states to remove regulatory controls on AMP that are part of State Implementation Plans designed to help meet the ground-level ozone standards. AMP is used in a variety of applications for pigment dispersion in water-based coatings such as house paints.  Learn More

Exclusion of 2,3,3,3-tetrafluoropropene

October 22, 2013 - EPA added 2,3,3,3-tetrafluoropropene (also known as HFO-1234yf, CAS number 754-12-1) to the list of compounds excluded from the regulatory definition of volatile organic compounds or VOC. Evidence shows that HFO-1234yf negligibly reactive in forming ground-level ozone. This action will allow states to remove regulatory controls on HFO-1234yf that are part of State Implementation Plans designed to help meet the ground-level ozone standards. HFO-1234yf is used in a variety of applications such as automobile air conditioners. Learn More

Exclusion of trans-1-chloro-3,3,3-trifluoroprop-1-ene (Solstice 1233zd(E)) 

August 28, 2013 - EPA added trans-1-chloro-3,3,3-trifluoroprop-1-ene (also known as Solstice 1233zd(E), CAS number 102687-65-0) to the list of compounds excluded from the regulatory definition of volatile organic compounds or VOC. Evidence shows that Solstice 1233zd(E) is negligibly reactive in forming ground-level ozone. This action will allow states to remove regulatory controls on Solstice 1233zd(E) that are part of State Implementation Plans designed to help meet the ground-level ozone standards. Solstice 1233zd(E) is used in a variety of applications including as a solvent in aerosol and non-aerosol applications, as a blowing agent in insulating foams for refrigerators/freezers and hot water heaters and as a refrigerant in commercial chillers and waste heat recovery (Rankin cycle) systems.  Learn More

Exlusion of a Group of Four Hydrofluoropolyethers (HFPEs)  

February 12, 2013 - EPA added a group of four Hydrofluoropolyethers (HFPEs) to the list of compounds excluded from the regulatory definition of VOC.  Evidence shows that these HFPEs are negligibly reactive in forming ground-level ozone. This action will allow states to remove regulatory controls on the four coupounds that are part of State Implementation Plans designed to help meet the ground-level ozone standards.  These compounds are used in a variety of applications as fire suppressants and refrigerants. Learn More