Substitutes in Ice Skating Rinks
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. Find more information on Technology Transitions Program restrictions.
Note: SNAP-related information published in the Federal Register takes precedence over all information on this page.
| Substitute | Trade Name(s) | Retrofit/ New | 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 | N | 0 | 0 | B2 | September 5, 1996; June 16, 2010 (pdf) (229 KB) | Acceptable | |
| Ammonia Vapor Compression | R/N | 0 | 0 | B2 | March 18, 1994; September 5, 1996; June 16, 2010 (pdf) (229 KB) | Acceptable | |
| 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 |
| G2018C | G2018C | R/N | 0.053 | 1,731 | A1 | September 5, 1996 | Acceptable |
| R-414A | GHG-X4, Autofrost, Chill-it, HCFC Blend Xi | R/N | 0.045 | 1,478 | A1 | September 5, 1996 | Acceptable |
| HCFC-22 | R/N | 0.055 | 1,810 | A1 | March 18, 1994 | Acceptable | |
| HCFO-1233zd(E) (Trans-1-chloro-3,3,3-trifluoroprop-1-ene) | Solstice® 1233zd(E) | N | <0.0004 | 3.7 | A1 | January 20, 2022 (pdf) (376 KB) | Acceptable |
| HFC-134a | R/N | 0 | 1,430 | A1 | March 18, 1994; June 16, 2010 (pdf) (229 KB) | Acceptable | |
| R-414B | Hot Shot, Kar Kool, HCFC Blend Omicron | R/N | 0.098 | 3,337 | A1 | September 5, 1996 | Acceptable |
| R-417C | Hot Shot 2 | R | 0 | 1,820 | A1 | October 4, 2011 (pdf) (201 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 (pdf) (181 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-401A | SUVA MP-39 | R | 0.037 | 1,182 | A1 | March 18, 1994 | Acceptable |
| R-401B | SUVA MP-66 | R | 0.040 | 1,288 | A1 | March 18, 1994 | Acceptable |
| R-404A | SUVA HP-62 | R/N | 0 | 3,920 | A1 | December 20, 2002 (pdf) (168 KB) | Acceptable |
| R-407A | Klea 60, Klea 407A | R/N | 0 | 2,110 | A1 | August 26, 1994; June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-407B | Klea 61 | R/N | 0 | 2,800 | A1 | August 26, 1994; June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-407C | Suva 407C, Klea 407C | R/N | 0 | 1,770 | A1 | February 8, 1996 (pdf) (152 KB); December 20, 2002 (pdf) (168 KB); August 21, 2003 (pdf) (161 KB) | Acceptable |
| R-407F | Genetron Performax LT | R/N | 0 | 1,820 | A1 | October 4, 2011 (pdf) (201 KB) | Acceptable |
| R-410A | AZ-20, Suva 9100, Puron | N | 0 | 2,090 | A1 | February 8, 1996 (pdf) (152 KB); December 20, 2002 (pdf) (168 KB) | Acceptable |
| R-410B | N | 0 | 2,230 | A1 | February 8, 1996 (pdf) (152 KB); June 16, 2010 (pdf) (229 KB) | Acceptable | |
| R-417A | ISCEON 59, NU-22 | R/N | 0 | 2,350 | A1 | December 6, 1999 (pdf) (226 KB); December 20, 2002 (pdf) (168 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-420A | Choice R-420A | R/N | 0.008 | 1,536 | A1 | October 1, 2004 (pdf) (186 KB) | Acceptable |
| R-421A | Choice R-421A | R/N | 0 | 2,630 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-421B | Choice R-421B | R/N | 0 | 3,190 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-422A | ISCEON 79 | R/N | 0 | 3,140 | A1 | October 1, 2004 (pdf) (186 KB) | Acceptable |
| R-422B | ICOR XAC1, NU-22B | R/N | 0 | 2,530 | A1 | March 29, 2006 (pdf) (181 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-422C | ICOR XLT1 | R/N | 0 | 3,390 | A1 | March 29, 2006 (pdf) (181 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-422D | ISCEON MO29 | R/N | 0 | 2,730 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-423A | ISCEON 39TC | R/N | 0 | 2,280 | A1 | March 22, 2002 (pdf) (156 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-424A | RS-44 | R/N | 0 | 2,440 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-426A | RS-24 | R/N | 0 | 1,510 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-428A | RS-52 | R/N | 0 | 3,610 | A1 | October 4, 2007 (pdf) (163 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-434A | RS-45 | R/N | 0 | 3,250 | A1 | October 4, 2007 (pdf) (163 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-437A | KDD6, ISCEON MO49 Plus | R/N | 0 | 1,810 | A1 | January 2, 2009 (pdf) (173 KB) | Acceptable |
| R-438A | KDD5, ISCEON MO99 | R/N | 0 | 2,270 | A1 | October 4, 2007 (pdf) (163 KB); June 16, 2010 (pdf) (229 KB) | Acceptable |
| R-442A | RS-50 | R | 0 | 1,890 | A1 | May 17, 2013 (pdf) (280 KB) | Acceptable |
| R-744 (Carbon Dioxide, CO2) | N | 0 | 1 | A1 | May 23, 2016 (pdf) (313 KB) | Acceptable | |
| R-507, R-507A | AZ-50 | R/N | 0 | 3,990 | A1 | December 20, 2002 (pdf) (168 KB) | Acceptable |
| RS-24 (2002 formulation) | R/N | 0 | 1,510 | A1 | December 20, 2002 (pdf) (168 KB); June 16, 2010 (pdf) (229 KB) | Acceptable | |
| RS-44 (2003 formulation) | R/N | 0 | 2,420 | A1 | June 16, 2010 (pdf) (229 KB) | Acceptable | |
| THR-03 | R/N | 0 | N/A | A1 | December 6, 1999 (pdf) (226 KB) | Acceptable | |
| THR-04 | R/N | >0 | N/A | A1 | June 8, 1999 (pdf) (143 KB) | Acceptable | |
| R-448A | Solstice® N-40 | R/N | 0 | 1,390 | A1 | October 4, 2018 (pdf) (308 KB); November 25, 2019 (pdf) (273 KB) | Acceptable |
| R-449A | Opteon™ XP 40 | R/N | 0 | 1,400 | A1 | October 4, 2018 (pdf) (308 KB); November 25, 2019 (pdf) (273 KB) | Acceptable |
| R-449B | Forane® 449B | R/N | 0 | 1,410 | A1 | October 4, 2018 (pdf) (308 KB); November 25, 2019 (pdf) (273 KB) | Acceptable |
| R-450A | Solstice® N-13 | R/N | 0 | 600 | A1 | October 4, 2018 (pdf) (308 KB) | Acceptable |
| R-513A | Opteon™ XP 10 | R/N | 0 | 630 | A1 | October 4, 2018 (pdf) (308 KB) | Acceptable |
| HFO-1234yf | N | 0 | 1 | A2L | June 13, 2024 (pdf) (1.17 MB) | Acceptable subject to use conditions: See rule for detailed conditions. | |
| HFO-1234ze(E) | N | 0 | 1 | A2L | June 13, 2024 (pdf) (1.17 MB) | Acceptable subject to use conditions: See rule for detailed conditions. | |
| R-454C | Opteon™ XL20 | N | 0 | 146 | A2L | June 13, 2024 (pdf) (1.17 MB) | Acceptable subject to use conditions: See rule for detailed conditions. |
| R-455A | Solstice® L40X | N | 0 | 146 | A2L | June 13, 2024 (pdf) (1.17 MB) | Acceptable subject to use conditions: See rule for detailed conditions. |
| R-457A | Forane® 457A | N | 0 | 137 | A2L | June 13, 2024 (pdf) (1.17 MB) | Acceptable subject to use conditions: See rule for detailed conditions. |
| R-516A | Forane® 516A | N | 0 | 140 | A2L | June 13, 2024 (pdf) (1.17 MB) | Acceptable subject to use conditions: See rule for detailed conditions. |
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