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Acceptable Substitutes in Refrigerated Transport
Substitutes are reviewed on the basis of ozone depletion potential, global warming potential, toxicity, flammability, and exposure potential. Lists of acceptable and unacceptable substitutes are updated several times each year. A chronological list of SNAP updates is also available.
Unacceptable substitutesNote: SNAP-related information published in the Federal Register takes precedence over all information on this page.
Acceptable Substitutes for CFCs (class I ODS) in Refrigerated Transport
| Substitute (Name Used in the Federal Register) | Trade Name | Refrigerant Being Replaced | Retrofit/ New |
|---|---|---|---|
| HCFC-22 | 12, 502 | R, N | |
| Ikon A | 12 | R, N | |
| Ikon B | 12 | R, N | |
| THR-02 | 12 | R, N | |
| HFC-134a | 12 | R, N | |
| R-401A, R-401B | MP-39, MP-66 | 12 | R, N |
| R-402A, R-402B | HP-80, HP-81 | 502 | R, N |
| R-404A | HP-62 | 502, 12, 500 | R, N |
| R-406A | GHG | 12, 500 | R |
| R-407A, R-407B | Klea 407A, 407B | 502 | R, N |
| R-408A (HCFC Blend Epsilon) | 502 | R | |
| R-409A (HCFC Blend Gamma) | 12 | R | |
| R-411A, R-411B | 12, 500, 502 | R, N | |
| R-507 | AZ-50 | 502 | R, N |
| Free Zone (HCFC Blend Delta) | Free Zone / RB-276 | 12 | R, N |
| Freeze 12 | Freeze 12 | 12 | R, N |
| FRIGC FR-12 (HCFC Blend Beta) | FRIGC FR-12 | 12, 500 | R, N |
| GHG-X4 | GHG-X4, Autofrost, Chill-it | 12, 500 | R, N |
| GHG-X5 | GHG-X5 | 12, 500 | R, N |
| GHG-HP (HCFC Blend Lambda) | GHG-HP | 12 | R, N |
| G2018C | G2018C | 12, 500, 502 | R, N |
| Hot Shot | Hot Shot, Kar Kool | 12, 500 | R, N |
| HCFC-22/HCFC-142b | 12 | R, N | |
| THR-04 | THR-04 | 502 | R, N |
| FOR12A | FOR12A | 12 | R, N |
| FOR12B | FOR12B | 12 | R, N |
| SP34E | SP34E | 12 | R, N |
| HFC-134a/HBr (92/8) | 12, 502 | N | |
| Direct Nitrogen Expansion | all | N | |
| Cryogenic Transport Refrigeration System | Cryo-Mechanical | 12, 502 | N |
| Stirling Cycle | all | N | |
| Self-chilling cans using CO 2 | 12, 500, 502 | N | |
| RS-24 (2002 formulation) | 12 | R, N | |
| NU-22 | NU-22 | 502 | R, N |
| R-407C | Suva 407C, Klea 407C | 502 | R, N |
| R-421B | Choice R421B | 12, 502 | R, N |
| R-426A | RS-24 | 12 | R, N |
| R-422C | ICOR XLT1 | 502 | R, N |
| R-428A | RS-52 | 502 | R, N |
| KDD6 | KDD6 | 12 | R, N |
Key: R = Retrofit Uses, N = New
Uses
Acceptable Substitutes for HCFCs (class II ODS) in Refrigerated Transport
| Substitute (Name Used in the Federal Register) | Trade Name | Refrigerant Being Replaced | Retrofit/ New |
|---|---|---|---|
| R-410A, R-410B | AZ-20, Suva 9100, Puron | N | |
| THR-03 | R, N | ||
| ISCEON 59, NU-22, R-417A | ISCEON 59, NU-22 | R, N | |
| R-407C | Suva 9000, Klea 66 | R, N | |
| R-507, R-507A | AZ-50 | R, N | |
| R-404A | HP62 | R, N | |
| R-125/134a/600a (28.1/70.0/1.9) | R, N | ||
| Self-Chilling cans using CO 2 | R, N | ||
| RS-44 (2003 formulation) | 22 | R, N | |
| ISCEON 79 | ISCEON 79 | R, N | |
| R-421A | Choice R421A | 22 | R, N |
| R-421B | Choice R421B | 22 | R, N |
| R-422D | ISCEON MO29 | 22 | R, N |
| R-424A | RS-44 | 22 | R, N |
| R-426A | RS-24 | 22 | R, N |
| KDD5, R-438A | ISCEON MO99 | 22 | R, N |
| R-434A | RS-45 | 22 | R, N |
| R-428A | RS-52 | 22, 22 blends including R-402A, -403A, -408A, and -411B | R, N |
| R-125/290/134a/600a (55.0/1.0/42.5/1.5) | ICOR AT-22 | 22 | R, N |
| R-422B | XAC1, NU-22B | 22 | R, N |
| R-422C | XLT1 | 22, 402A, 402B, 408A | R, N |
| R-407A | KLEA 60, KLEA 407A | 22, 22 blends including R-401A, -401B, -402A, and -402B | R, N |
Key: R = Retrofit Uses, N = New
Uses