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Composition of Refrigerant Blends

The following tables show the percentage composition of refrigerant blends found acceptable, acceptable subject to narrowed use limits, or acceptable subject to use conditions). The specific determinations that apply to these blends are listed by end-use. In addition, a chronological list of SNAP updates is available from the hotline. If your browser is unable to display tables, please call the hotline for a free paper copy of these tables.

Unacceptable substitutes

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

Percentage Composition of Substitutes for CFC-12
Trade Name ASHRAE
Number
HCFCs HFCs HCs
22 124 142b 32 125 134a 152a 227ea Ethane Propane n-Butane
(R-600)
Isobutane
(R-600a)
MP-39 401A 53 34         13          
MP-66 401B 61 28         11          
MP-52 401C 33 52         15          
GHG 406A 55   41                 4
407D       15 15 70            
FX-56 409A 60 25 15                  
Hot Shot 414B 50 39 9.5                 1.5
GHG-X4 414A 51 28.5 16.5                 4
Choice Refrigerant 420A     12     88            
RS-24 (new composition) 426A         5.1 93         1.3 0.6
Freeze 12       20     80            
Free Zone
(2% is a lubricant)
      19     79            
FRIGC FR-12     39       59         2  
GHG-HP   65   31                 4
GHG-X5   41   15         40       4
KDD6
Claimed as confidential business information
Hot Shot 2           19.5 78.8         1.7  
HCR-188C R-441A                 3.1 54.8 36.1 6.0
RS-50 R-442A       31.0 31.0 30.0 3.0 5.0        
Percentage Composition of Substitutes for R-502 [R-22/115 (48.8/51.2)]
Trade Name ASHRAE
Number
HCFC-22 HFCs   HCs
32 125 134a 143a 152a 227ea Propane n-Butane (R-600) Isobutane Propylene
HP-80 402A 38   60         2      
HP-81 402B 60   38         2      
HP-62, FX-70 404A     44 4 52            
KLEA 407A 407A   20 40 40              
KLEA 407B 407B   10 70 20              
FX-10 408A 47   7   46            
R-411A 411A 87.5         11         1.5
R-411B 411B 94         3         3
ICOR XLT1 422C     82 15           3  
AZ-50 507     50   50            
G2018C   95.5         1.5         3
Hot Shot 2       19.5 78.8         1.7      
RS-50 R-442A   31.0 31.0 30.0   3.0 5.0          
Percentage Composition of Substitutes for HCFC-22
Trade Name ASHRAE
Number
HFC-32 HFC-125 HFC-134a HFC-143a HFC-152a HFC-227ea Ethane Propane n-Butane (R-600) Isobutane Isopentane
R-404A 404A   44 4 52              
KLEA 60, KLEA 407A 407A 20 40 40                
KLEA 407C, AC9000 407C 23 25 52                
AZ-20, Puron, Suva 9100 410A 50 50                  
AC9100 410B 45 55                  
NU-22/ISCEON 59 417A   46.6 50           3.4    
Choice R421A 421A   58 42                
Choice 421B 421B   85 15                
ISCEON 79 422A   85.1 11.5             3.4  
ICOR XAC1 422B   55 42             3  
ICOR XLT1 422C 45 82 15             3  
ISCEON MO29 422D   65.1 31.5             3.4  
RS-44 (new composition) 424A   50.5 47.0           1.0 0.9 0.6
RS-24 (new composition) 426A   5.1 93           1.3 0.6  
Forane 427A 427A 15 25 50 10              
RS-52 428A   77.5   20.0       0.6   1.9  
RS-45 434A   63.2 16 18           2.8  
R-507A 507A   50   50              
ICOR AT22 55 42.5       1 1.5
KDD5, ISCEON MO99 R-438A 8.5 45.0 44.2           1.7   0.6
Hot Shot 2     19.5 78.8           1.7    
Genetron Performax LT R-407F 30.0 30.0 40.0                
HCR-188C R-441A             3.1 54.8 36.1 6.0  
RS-50 R-442a 31.0 31.0 30.0   3.0 5.0          
Percentage Composition of Substitutes for CFC-113, R-13B1, and R-503 [R-23/13 (40.1/59.9)]
Trade Name ASHRAE
Number
HCFC-22 HFC-23 HCFC-125 HCFC-134a HCFC-143a HFC-152a Propane n-Butane (R-600) PFC-116
(perfluoroethane)
PFC-218
(perfluoro-
propane)
R-403B 403B 56           5     39
Klea 5R3 508A   39             61  
Suva 95 508B   46             54  
NARM-502   90 5       5        
AZ-50, R-507A R-507A     50.0   50.0          
Hot Shot 2       19.5 78.8       1.7    

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