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  2. Significant New Alternatives Policy (SNAP)

Substitutes in Household Refrigerators and Freezers

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 acceptableThis 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 unacceptableThis 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.

Many acceptable substitutes under SNAP may be restricted under the Technology Transitions Program. For more information on Technology Transitions Program restrictions, visit: https://www.epa.gov/climate-hfcs-reduction/technology-transitions-program

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

Filters              
Substitute Trade Name(s) Retrofit/New ODPA 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. GWPThe 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. ASHRAEASHRAE 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 (pdf) (140 KB);
September 5, 1996
Acceptable
FOR12A FOR12A R/N 0 1,100 A1 December 18, 2000 (pdf) (257 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
FOR12B FOR12B R/N 0 1,000 A1 December 18, 2000 (pdf) (257 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
RB-276 Free Zone, HCFC Blend Delta  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
R-416A FRIGC FR-12, HCFC Blend Beta R/N 0.009 1,081 A1 February 8, 1996 (pdf) (151 KB) Acceptable
GHG-HP HCFC Blend Lambda R/N 0.056 1,893 A1 February 8, 1996 (pdf) (151 KB) Acceptable
R-414A GHG-X4, Autofrost, Chill-it, HCFC Blend Xi 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 (pdf) (133 KB) Acceptable
HCFC-22/HCFC-142b   R/N 0.055-0.065 1,810-2,310 A1 June 3, 1997 (pdf) (133 KB) Acceptable
HFC-134a   R/N 0 1,430 A1 March 18, 1994;
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
HFC-152a   N 0 124 A2 March 18, 1994 Acceptable
R-414B  Hot Shot, Kar Kool, HCFC Blend Omicron  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 (pdf) (223 KB) Acceptable
Ikon B   N 0 N/A A1 June 19, 2000 (pdf) (223 KB) 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 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-290 (Propane)   N 0 3 A3 April 10, 2015 (pdf) (769 KB);
August 8, 2018
Acceptable with Use Conditions: See rule for detailed conditions.
R-401A SUVA MP-39 N 0.037 1,182 A1 January 13, 1995 (pdf) (185 KB) Acceptable
R-401B SUVA MP-66 N 0.040 1,288 A1 January 13, 1995 (pdf) (185 KB) 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 SUVA HP-62 R/N 0 3,920 A1 March 18, 1994;
January 13, 1995 (pdf) (185 KB);
December 20, 2002 (pdf) (168 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-406A GHG-12, GHG-X3, McCool, Autofrost X3 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 (pdf) (151 KB);
December 20, 2002 (pdf) (168 KB);
August 21, 2003 (pdf) (160 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-407F  Genetron Performax LT R/N 0 1,820 A1 October 4, 2011 (pdf) (200 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
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 (pdf) (151 KB);
December 20, 2002 (pdf) (168 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-410B   N 0 2,230 A1 February 8, 1996 (pdf) (151 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-417A ISCEON 59, NU-22 R/N 0 2,350 A1 December 6, 1999 (pdf) (225 KB);
June 16, 2010 (pdf) (229 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-420A Choice R-420A R/N 0.008 1,536 A1 October 1, 2004 (pdf) (186KB) Acceptable
R-421A Choice R-421A R/N 0 2,630 A1 September 28, 2006 (pdf) (182 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-421B Choice R-421B R/N 0 3,190 A1 September 28, 2006 (pdf) (182 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-422A ISCEON 79 R/N 0 3,140 A1 October 1, 2004 (pdf) (186 KB);
December 1, 2016 (pdf) (969 KB)
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 (pdf) (969 KB)
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 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-422D ISCEON MO29 R/N 0 2,730 A1 September 28, 2006 (pdf) (182 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-424A RS-44 R/N 0 2,440 A1 September 28, 2006 (pdf) (182 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-426A RS-24 R/N 0 1,510 A1 September 28, 2006 (pdf) (182 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-427A Forane 427A R 0 2,140 A1 January 2, 2009 (pdf) (173 KB) Acceptable
R-428A RS-52 R/N 0 3,610 A1 October 4, 2007 (pdf) (163 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-434A RS-45 R/N 0 3,250 A1 October 4, 2007 (pdf) (163 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-437A KDD6, ISCEON MO49 Plus R/N 0 1,810 A1 January 2, 2009 (pdf) (173 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-438A KDD5, ISCEON MO99 R/N 0 2,270 A1 October 4, 2007 (pdf) (163 KB);
June 16, 2010 (pdf) (229 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-441A HCR-188C N 0 <5 A3 December 20, 2011 (pdf) (296 KB);
August 8, 2018
Acceptable with Use Conditions: See rule for detailed conditions.
R-450A Solstice® N-13 R/N 0 601 A1 October 21, 2014 (pdf) (345 KB) Acceptable
R-507, R-507A AZ-50 R/N 0 3,990 A1 January 13, 1995 (pdf) (185 KB);
December 20, 2002 (pdf) (168 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
R-513A Opteon® XP 10 R/N 0 630 A1 July 16, 2015 (pdf) (353 KB) Acceptable
R-600a (Isobutane)   N 0 3 A3 December 20, 2011 (pdf) (296 KB);
August 8, 2018
Acceptable with Use Conditions: See rule for detailed conditions.
RS-24 (2002 formulation)   R/N 0 1,510 A1 December 20, 2002 (pdf) (168 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
RS-44 (2003 formulation)   R/N 0 2,420 A1 August 21, 2003 (pdf) (160 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
Self-chilling cans using CO2   N 0 1 A1 February 24, 1998 (pdf) (140 KB) Acceptable
SP34E SP34E R/N 0 <1,470 A1 December 18, 2000 (pdf) (257 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
THR-01   N >0 N/A A2 February 24, 1998 (pdf) (140 KB) Acceptable
THR-02   N 0 N/A A1 December 6, 1999 (pdf) (225 KB) Acceptable
THR-03   R/N 0 N/A A1 December 6, 1999 (pdf) (225 KB);
December 1, 2016 (pdf) (969 KB)
Unacceptable in new equipment, as of January 1, 2021.
THR-04   R/N >0 N/A A1 June 8, 1999 (pdf) (142 KB) Acceptable
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Last updated on May 27, 2025
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