ASHRAE Refrigerant Designations
ASHRAE Refrigerant Designations
The tables contained on this page list approved refrigerant numbers from ANSI/ASHRAE 34-2013, Designation and Safety Classification of Refrigerants, the latest edition of Standard 34, which describes a shorthand way of naming refrigerants and assigns safety classifications based on toxicity and flammability data.*
Further information can be found in the latest version of Standard 34, available in the ASHRAE bookstore, and its published addenda, available on the Standards Addenda page.
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Refrigerants
Methane Series
Ethane Series
Ethers
Propane
Cyclic Organic Compounds
Miscellaneous Organic Compounds
Nitrogen Compounds
Inorganic Compounds
Unsaturated Organic Compounds
Refrigerant Blends
Zeotropes
Azeotropes
Refrigerants
|
Number
|
Chemical Name
|
Chemical Formula
|
|
Methane Series
|
||
| 11 | trichlorofluoromethane | CCl 3F |
| 12 | dichlorodifluoromethane | CCl 2F 2 |
| 12B1 | bromochlorodifluoromethane | CBrClF 2 |
| 13 | chlorotrifluoromethane | CClF 3 |
| 13B1 | bromotrifluoromethane | CBrF 3 |
| 14e | tetrafluoromethane (carbon tetrafluoride) | CF 4 |
| 21 | dichlorofluoromethane | CHCl 2F |
| 22 | chlorodifluoromethane | CHClF 2 |
| 23 | trifluoromethane | CHF 3 |
| 30 | dichloromethane (methylene chloride) | CH 2Cl 2 |
| 31 | chlorofluoromethane | CH 2ClF |
| 32 | difluoromethane (methylene fluoride) | CH 2F 2 |
| 40 | chloromethane (methyl chloride) | CH 3Cl |
| 41 | fluoromethane (methyl fluoride) | CH 3F |
| 50 | methane | CH 4 |
|
Number
|
Chemical Name
|
Chemical Formula
|
|
Ethane Series
|
||
| 113 | 1,1,2-trichloro-1,2,2-trifluoroethane | CCl 2FCClF 2 |
| 114 | 1,2-dichloro-1,1,2,2-tetrafluoromethane | CClF 2CClF 2 |
| 115 | chloropentafluoroethane | CClF 2CF 3 |
| 116 | hexafluoroethane | CF 3CF 3 |
| 123 | 2,2-dichloro-1,1,1-trifluoroethane | CHCl 2CF 3 |
| 124 | 2-chloro-1,1,1,2-tetrafluoroethane | CHClFCF 3 |
| 125 | pentafluoroethane | CHF 2CF 3 |
| 134a | 1,1,1,2-tetrafluoroethane | CH 2FCF 3 |
| 141b | 1,1-dichloro-1-fluoroethane | CH 3CCl 2F |
| 142b | 1-chloro-1,1-difluoroethane | CH 3CClF 2 |
| 143a | 1,1,1-trifluoroethane | CH 3CF 3 |
| 152a | 1,1-difluoroethane | CH 3CHF 2 |
| 170 | ethane | CH 3CH 3 |
|
Number
|
Chemical Name
|
Chemical Formula
|
|
Ethers
|
||
| E170 | Dimethyl Ether | CH3OCH3 |
|
Number
|
Chemical Name
|
Chemical Formula
|
|
Propane
|
||
| 218 | octafluoropropane | CF 3CF 2CF 3 |
| 227ea | 1,1,1,2,3,3,3-heptafluoropropane | CF 3CHFCF 3 |
| 236fa | 1,1,1,3,3,3-hexafluoropropane | CF 3CH 2CF 3 |
| 245fa | 1,1,1,3,3-pentafluoropropane | CHF 2CH 2CF 3 |
| 290 | propane | CH 3CH 2CH 3 |
|
Number
|
Chemical Name
|
Chemical Formula
|
|
Cyclic Organic Compounds
|
||
| C318 | octafluorocyclobutane | -(CF 2) 4– |
| Miscellaneous Organic Compounds | ||
|
Number
|
Chemical Name
|
Chemical Formula
|
|
hydrocarbons
|
||
| 600 | butane | CH 3CH 2CH 2CH 3 A3 |
| 600a | isobutane | CH(CH 3) 2CH 3 A3 |
| 601 | Pentane | CH 3CH 2CH 2 CH 2CH3 |
| 601a | Isopentane | CH(CH 3) 2 CH 2CH 3 |
| oxygen compounds | ||
| 610 | ethyl ether | CH 3CH 2 OCH 2CH 3 |
| 611 | methyl formate | HCOOCH 3 |
| sulfur compounds | ||
| 620 (Reserved for future assignment) | ||
|
Number
|
Chemical Name
|
Chemical Formula
|
|
Nitrogen Compounds
|
||
| 630 | methyl amine | CH 3NH 2 |
| 631 | ethyl amine | CH 3CH 2(NH 2) |
|
Number
|
Chemical Name
|
Chemical Formula
|
|
Inorganic Compounds
|
||
| 702 | hydrogen | H 2 |
| 704 | helium | He |
| 717 | ammonia | NH 3 |
| 718 | water | H 2O |
| 720 | neon | Ne |
| 728 | nitrogen | N 2 |
| 732 | oxygen | O 2 |
| 740 | argon | Ar |
| 744 | carbon dioxide | CO 2 |
| 744A | nitrous oxide | N 2O |
| 764 | sulfur dioxide | SO 2 |
|
Number
|
Chemical Name
|
Chemical Formula
|
|
Unsaturated Organic Compounds
|
||
| 1150 | ethene (ethylene) | CH2=CH2 |
| 1234yf | 2,3,3,3-tetrafluoro-1-propene | CF3CF=CH2 |
| 1234ze(E) | trans-1,3,3,3-tetrafluoro-1-propene | CF3CH=CHF |
| 1270 | propene (propylene) | CH3CH=CH 2 |
Refrigerant Blends
|
Number
|
Refrigerant Composition (Mass % )
|
|
Zeotropes
|
|
| 400 | R-12/114 (must be specified) (50.0/50.0) (60.0/40.0) |
| 401A | R-22/152a/124 (53.0/13.0/34.0) |
| 401B | R-22/152a/124 (61.0/11.0/28.0 |
| 401C | R-22/152a/124 (33.0/15.0/52.0) |
| 402A | R-125/290/22 (60.0/2.0/38.0) |
| 402B | R-125/290/22 (38.0/2.0/60.0) |
| 403A | R-290/22/218 (5.0/75.0/20.0) |
| 403B | R-290/22/218 (5.0/56.0/39.0) |
| 404A | R-125/143a/134a (44.0/52.0/4.0) |
| 405A | R-22/152a/142b/C318 (45.0/7.0/5.5/42.5) |
| 406A | R-22/600a/142b (55.0/4.0/41.0) |
| 407A | R-32/125/134a (20.0/40.0/40.0) |
| 407B | R-32/125/134a (10.0/70.0/20.0) |
| 407C | R-32/125/134a (23.0/25.0/52.0) |
| 407D | R-32/125/134a (15.0/15.0/70.0) |
| 407E | R-32/125/134a (25.0/15.0/60.0) |
| 407F | R-32/125/134a (30.0/30.0/40.0) |
| 408A | R-125/143a/22 (7.0/46.0/47.0) |
| 409A | R-22/124/142b (60.0/25.0/15.0) |
| 409B | R-22/124/142b (65.0/25.0/10.0) |
| 410A | R-32/125 (50.0/50.0) |
| 410B | R-32/125 (45.0/55.0) |
| 411A | R-1270/22/152a) (1.5/87.5/11.0) |
| 411B | R-1270/22/152a (3.0/94.0/3.0) |
| 412A | R-22/218/143b (70.0/5.0/25.0 k |
| 413A | R-218/134a/600a (9.0/88.0/3.0) |
| 414A | R-22/124/600a/142b (51.0/28.5/4.0/16.5) |
| 414B | R-22/124/600a/142b (50.0/39.0/1.5/9.5) |
| 415A | R-22/152a (82.0/18.0) |
| 415B | R-22/152a (25.0/75.0) |
| 416A | R-134a/124/600 (59.0/39.5/1.5) |
| 417A | R-125/134a/600 (46.6/50.0/3.4) |
| 417B | R-125/134a/600 (79.0/18.3/2.7) |
| 417C | R-125/134a/600 (19.5/78.8/1.7) |
| 418A | R-290/22/152a (1.5/96.0/2.5) |
| 419A | R-125/134a/E170 (77.0/19.0/4.0) |
| 419B | R-125/134a/E170 (48.5/48.0/3.5) |
| 420A | R-134a/142b (88.0/12.0) |
| 421A | R-125/134a (58.0/42.0) |
| 421B | R-125/134a (85.0/15.0) |
| 422A | R-125/134a/600a (85.1/11.5/3.4) |
| 422B | R-125/134a/600a (55.0/42.0/3.0) |
| 422C | R-125/134a/600a (82.0/15.0/3.0) |
| 422D | R-125/134a/600a (65.1/31.5/3.4) |
| 422E | R-125/134a/600a (58.0/39.3/2.7) |
| 423A | 134a/227ea (52.5/47.5) |
| 424A | R-125/134a/600a/600/601a (50.5/47.0/0.9/1.0/0.6) |
| 425A | R-32/134a/227ea (18.5/69.5/12) |
| 426A | R-125/134a/600/601a (5.1/93.0/1.3/0.6) |
| 427A | R-32/125/143a/134a (15.0/25.0/10.0/50.0) |
| 428A | R-125/143a/290/600a (77.5/20.0/0.6/1.9) |
| 429A | R-E170/152a/600a (60.0/10.0/30.0) |
| 430A | R-152a/600a (76.0/24.0) |
| 431A | R-290/152a (71.0/29.0) |
| 432A | R-1270/E170 (80.0/20.0) |
| 433A | R-1270/290 (30.0/70.0) |
| 433B | R-1270/290 (5.0/95.0) |
| 433C | R-1270/290 (25.0/75.0) |
| 434A | R-125/143a/134a/600a |
| 435A | R-E170/152a (80.0/20.0) |
| 436A | R-290/600a (56.0/44.0) |
| 436B | R-290/600a (52.0/48.0) |
| 437A | R-125/134a/600/601 (19.5/78.5/1.4/0.6) |
| 438A | R-32/125/134a/600/601a (8.5/45.0/44.2/1.7/0.6) |
| 439A | R-32/125/600a (50.0/47.0/3.0) |
| 440A | R-290/134a/152a (0.6/1.6/97.8) |
| 441A | R-170/290/600a/600 (3.1/54.8/6.0/36.1) |
| 442A | R-32/125/134a/152a/227ea (31.0/31.0/30.0/3.0/5.0) |
| 443A | R-1270/290/600a (55.0/40.0/5.0) |
| 444A | R-32/152a/1234ze(E) (12.0/5.0/83.0) |
| 445A | R-744/134a/1234ze(E) (6.0/9.0/85.0) |
|
Number
|
Refrigerant Composition (Mass % )
|
|
Azeotropes
|
|
| 500 | R-12/152a (73.8/26.2) |
| 501 | R-22/12 (75.0/25.0) |
| 502 | R-22/115 (48.8/51.2) |
| 503 | R-23/13 (40.1/59.9) |
| 504 | R-32/115 (48.2/51.8) |
| 505 | R-12/31 (78.0/22.0) |
| 506 | R-31/114 (55.1/44.9) |
| 507A | R-125/143a (50.0/50.0) |
| 508A | R-23/116 (39.0/61.0) |
| 508B | R-23/116 (46.0/54.0) |
| 509A | R-22/218 (44.0/56.0) |
| 510A | R-E170/600a (88.0/12.0) |
| 511A | R-290/152a (95.0/5.0) |
| 512A | R-134a/152a (5.0/95.0) |
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