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Significant New Alternatives Policy (SNAP)

Substitutes in Household Refrigerators and Freezers

You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.Substitutes are reviewed on the basis of environmental and health risks, including factors such as ozone depletion potential, global warming potential, toxicity, flammability, and exposure potential. Lists of acceptableHelpacceptableThis designation means that a substitute may be used, without restriction, to replace the relevant ODS within the end-use specified. For example, HCFC-22 is an acceptable substitute for R-502 in industrial process refrigeration. Note that all SNAP determinations apply to the use of a specific product as a substitute for a specific ODS in a specific end-use. and unacceptableHelpUnacceptableThis designation means that it is illegal to use a product as a substitute for an ODS in a specific end-use. For example, HCFC-141b is an unacceptable substitute for CFC-11 in building chillers. Note that all SNAP determinations apply to the use of a specific product as a substitute for a specific ODS in a specific end-use. substitutes are updated several times each year. The list of substitutes is shown below.

Note: SNAP-related information published in the Federal Register takes precedence over all information on this page.

               
Substitute Trade Name Retrofit/New ODPHelpODPA number that refers to the amount of ozone depletion caused by a substance. The ODP is the ratio of the impact on ozone of a chemical compared to the impact of a similar mass of CFC-11. Thus, the ODP of CFC-11 is defined to be 1.0. Other CFCs and HCFCs have ODPs that range from 0.01 to 1.0. The halons have ODPs ranging up to 10. Carbon tetrachloride has an ODP of 1.2, and methyl chloroform's ODP is 0.11. HFCs have zero ODP because they do not contain chlorine. A table of all ozone-depleting substances (https://www3.epa.gov/ozone/science/ods/index.html) shows their ODPs, GWPs, and CAS numbers. GWPHelpGWPThe index used to translate the level of emissions of various gases into a common measure in order to compare the relative radiative forcing of different gases without directly calculating the changes in atmospheric concentrations. GWPs are calculated as the ratio of the radiative forcing that would result from the emissions of one kilogram of a greenhouse gas to that from the emission of one kilogram of carbon dioxide over a period of time (usually 100 years). Gases involved in complex atmospheric chemical processes have not been assigned GWPs. See lifetime. ASHRAEHelpASHRAEASHRAE is an international organization that establishes standards for the uniform testing and rating of heating, ventilation, air conditioning, and refrigeration equipment. It also conducts related research, disseminates publications, and provides continuing education to its members.
Designation
(Safety
Classification)
SNAP Listing Date Listing Status
Ammonia Absorption   R/N 0 0 B2 July 28, 1995;
September 5, 1996
Acceptable
FOR12A FOR12A R/N 0 1,100 A1 December 18, 2000;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
FOR12B FOR12B R/N 0 1,000 A1 December 18, 2000;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
Free Zone (HCFC Blend Delta) Free Zone / RB-276 R/N 0.013 1,592 A1 September 5, 1996 Acceptable
Freeze 12 Freeze 12 R/N 0.013 1,606 A1 September 5, 1996 Acceptable
FRIGC FR-12 (HCFC Blend Beta) FRIGC FR-12 R/N 0.009 1,081 A1 February 8, 1996 Acceptable
GHG-HP (HCFC Blend Lambda) GHG-HP R/N 0.056 1,893 A1 February 8, 1996 Acceptable
GHG-X4 GHG-X4, Autofrost, Chill-it R/N 0.045 1,478 A1 September 5, 1996 Acceptable
GHG-X5 GHG-X5 R/N 0.032 2,377 A1 June 3, 1997 Acceptable
HCFC-22/HCFC-142b   R/N 0.055-0.065 1,810-2,310 A1 June 3, 1997 Acceptable
HFC-134a 134a R/N 0 1,430 A1 March 18, 1994;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
HFC-152a   N 0 124 A2 March 18, 1994 Acceptable
Hot Shot Hot Shot, Kar Kool R/N 0.098 3,337 A1 September 5, 1996 Acceptable
Ikon A Ikon-12, Blend Zeta N 0 N/A A1 June 19, 2000 Acceptable
Ikon B   N 0 N/A A1 June 19, 2000 Acceptable
R-125/R-290/R-134a/R-600a (55.0/1.0/42.5/1.5) ICOR AT-22 R/N 0 2,530 A1 March 29, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-290 (Propane)   N 0 3 A3 April 10, 2015 Acceptable with Use Conditions: See rule for detailed conditions.
R-401A SUVA MP-39 N 0.037 1,182 A1 January 13, 1995 Acceptable
R-401B SUVA MP-66 N 0.040 1,288 A1 January 13, 1995 Acceptable
R-402A HP-80 R 0.019 2,746 A1 August 26, 1994 Acceptable
R-402B HP-81 R 0.03 2,379 A1 August 26, 1994 Acceptable
R-404A HP-62 R/N 0 3,920 A1 March 18, 1994;
January 13, 1995;
December 20, 2002;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-406A GHG R 0.057 1,900 A2 August 26, 1994 Acceptable
R-407C Suva 407C, Klea 407C R/N 0 1,770 A1 February 8, 1996;
December 20, 2002;
August 21, 2003;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-407F  Genetron Performax LT R/N 0 1,820 A1 October 4, 2011;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-409A (HCFC Blend Gamma) R-409A (HCFC Blend Gamma) R 0.047 1,558 A1 August 26, 1994 Acceptable
R-410A AZ-20, Suva 9100, Puron N 0 2,090 A1 February 8, 1996;
December 20, 2002;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-410B   N 0 2,230 A1 February 8, 1996;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-417A ISCEON 59, NU-22 R/N 0 2,350 A1 December 6, 1999;
June 16, 2010;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-420A Choice R-420A R/N 0.008 1,536 A1 October 1, 2004 Acceptable
R-421A Choice R-421A R/N 0 2,630 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-421B Choice R-421B R/N 0 3,190 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-422A ISCEON 79 R/N 0 3,140 A1 October 1, 2004;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-422B ICOR XAC1, NU-22B R/N 0 2,530 A1 March 29, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-422C ICOR XLT1 R/N 0 3,390 A1 March 29, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-422D ISCEON MO29 R/N 0 2,730 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-424A RS-44 R/N 0 2,440 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-426A RS-24 R/N 0 1,510 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-427A Forane 427A R 0 2,140 A1 January 2, 2009 Acceptable
R-428A RS-52 R/N 0 3,610 A1 October 4, 2007;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-434A RS-45 R/N 0 3,250 A1 October 4, 2007;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-437A KDD6, ISCEON MO49 Plus R/N 0 1,810 A1 January 2, 2009;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-438A KDD5, ISCEON MO99 R/N 0 2,270 A1 October 4, 2007;
June 16, 2010;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-441A HCR-188C N 0 <5 A3 December 20, 2011 Acceptable with Use Conditions: See rule for detailed conditions.
R-450A Solstice® N-13 R/N 0 601 A1 October 21, 2014 Acceptable
R-507, R-507A AZ-50 R/N 0 3,990 A1 January 13, 1995;
December 20, 2002;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
R-513A Opteon® XP 10 R/N 0 630 A1 July 16, 2015 Acceptable
R-600a (Isobutane)   N 0 3 A3 December 20, 2011 Acceptable with Use Conditions: See rule for detailed conditions.
RS-24 (2002 formulation)   R/N 0 1,510 A1 December 20, 2002;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
RS-44 (2003 formulation)   R/N 0 2,420 A1 August 21, 2003;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
Self-chilling cans using CO2   N 0 1 A1 February 24, 1998 Acceptable
SP34E SP34E R/N 0 <1,470 A1 December 18, 2000;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
THR-01   N >0 N/A A2 February 24, 1998 Acceptable
THR-02   N 0 N/A A1 December 6, 1999 Acceptable
THR-03   R/N 0 N/A A1 December 6, 1999;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2021.
THR-04   R/N >0 N/A A1 June 8, 1999 Acceptable