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
11trichlorofluoromethaneCCl 3F
12dichlorodifluoromethaneCCl 2F 2
12B1bromochlorodifluoromethaneCBrClF 2
13chlorotrifluoromethaneCClF 3
13B1bromotrifluoromethaneCBrF 3
14etetrafluoromethane (carbon tetrafluoride)CF 4
21dichlorofluoromethaneCHCl 2F
22chlorodifluoromethaneCHClF 2
23trifluoromethaneCHF 3
30dichloromethane (methylene chloride)CH 2Cl 2
31chlorofluoromethaneCH 2ClF
32difluoromethane (methylene fluoride)CH 2F 2
40chloromethane (methyl chloride)CH 3Cl
41fluoromethane (methyl fluoride)CH 3F
50methaneCH 4

Number
Chemical Name
Chemical Formula
Ethane Series
1131,1,2-trichloro-1,2,2-trifluoroethaneCCl 2FCClF 2
1141,2-dichloro-1,1,2,2-tetrafluoromethaneCClF 2CClF 2
115chloropentafluoroethaneCClF 2CF 3
116hexafluoroethaneCF 3CF 3
1232,2-dichloro-1,1,1-trifluoroethaneCHCl 2CF 3
1242-chloro-1,1,1,2-tetrafluoroethaneCHClFCF 3
125pentafluoroethaneCHF 2CF 3
134a1,1,1,2-tetrafluoroethaneCH 2FCF 3
141b1,1-dichloro-1-fluoroethaneCH 3CCl 2F
142b1-chloro-1,1-difluoroethaneCH 3CClF 2
143a1,1,1-trifluoroethaneCH 3CF 3
152a1,1-difluoroethaneCH 3CHF 2
170ethaneCH 3CH 3

Number
Chemical Name
Chemical Formula
Ethers
E170Dimethyl EtherCH3OCH3

Number
Chemical Name
Chemical Formula
Propane
218octafluoropropaneCF 3CF 2CF 3
227ea1,1,1,2,3,3,3-heptafluoropropaneCF 3CHFCF 3
236fa1,1,1,3,3,3-hexafluoropropaneCF 3CH 2CF 3
245fa1,1,1,3,3-pentafluoropropaneCHF 2CH 2CF 3
290propaneCH 3CH 2CH 3

Number
Chemical Name
Chemical Formula
Cyclic Organic Compounds
C318octafluorocyclobutane-(CF 2) 4

Miscellaneous Organic Compounds
Number
Chemical Name
Chemical Formula
hydrocarbons
600butaneCH 3CH 2CH 2CH 3 A3
600aisobutaneCH(CH 3) 2CH 3 A3
601PentaneCH 3CH 2CH 2 CH 2CH3
601aIsopentaneCH(CH 3) 2 CH 2CH 3
oxygen compounds
610ethyl etherCH 3CH 2 OCH 2CH 3
611methyl formateHCOOCH 3
sulfur compounds
620           (Reserved for future assignment)

Number
Chemical Name
Chemical Formula
Nitrogen Compounds
630methyl amineCH 3NH 2
631ethyl amineCH 3CH 2(NH 2)

Number
Chemical Name
Chemical Formula
Inorganic Compounds
702hydrogenH 2
704heliumHe
717ammoniaNH 3
718waterH 2O
720neonNe
728nitrogenN 2
732oxygenO 2
740argonAr
744carbon dioxideCO 2
744Anitrous oxideN 2O
764sulfur dioxideSO 2

Number
Chemical Name
Chemical Formula
Unsaturated Organic Compounds
1150ethene (ethylene)CH2=CH2
1234yf2,3,3,3-tetrafluoro-1-propeneCF3CF=CH2
1234ze(E)trans-1,3,3,3-tetrafluoro-1-propeneCF3CH=CHF
1270propene (propylene)CH3CH=CH 2

Refrigerant Blends

Number
Refrigerant Composition (Mass % )
Zeotropes
400R-12/114 (must be specified)
(50.0/50.0)
(60.0/40.0)
401AR-22/152a/124 (53.0/13.0/34.0)
401BR-22/152a/124 (61.0/11.0/28.0
401CR-22/152a/124 (33.0/15.0/52.0)
402AR-125/290/22 (60.0/2.0/38.0)
402BR-125/290/22 (38.0/2.0/60.0)
403AR-290/22/218 (5.0/75.0/20.0)
403BR-290/22/218 (5.0/56.0/39.0)
404AR-125/143a/134a (44.0/52.0/4.0)
405AR-22/152a/142b/C318 (45.0/7.0/5.5/42.5)
406AR-22/600a/142b (55.0/4.0/41.0)
407AR-32/125/134a (20.0/40.0/40.0)
407BR-32/125/134a (10.0/70.0/20.0)
407CR-32/125/134a (23.0/25.0/52.0)
407DR-32/125/134a (15.0/15.0/70.0)
407ER-32/125/134a (25.0/15.0/60.0)
407FR-32/125/134a (30.0/30.0/40.0)
408AR-125/143a/22 (7.0/46.0/47.0)
409AR-22/124/142b (60.0/25.0/15.0)
409BR-22/124/142b (65.0/25.0/10.0)
410AR-32/125 (50.0/50.0)
410BR-32/125 (45.0/55.0)
411AR-1270/22/152a) (1.5/87.5/11.0)
411BR-1270/22/152a (3.0/94.0/3.0)
412AR-22/218/143b (70.0/5.0/25.0 k
413AR-218/134a/600a (9.0/88.0/3.0)
414AR-22/124/600a/142b (51.0/28.5/4.0/16.5)
414BR-22/124/600a/142b (50.0/39.0/1.5/9.5)
415AR-22/152a (82.0/18.0)
415BR-22/152a (25.0/75.0)
416AR-134a/124/600 (59.0/39.5/1.5)
417AR-125/134a/600 (46.6/50.0/3.4)
417BR-125/134a/600 (79.0/18.3/2.7)
417CR-125/134a/600 (19.5/78.8/1.7)
418AR-290/22/152a (1.5/96.0/2.5)
419AR-125/134a/E170 (77.0/19.0/4.0)
419BR-125/134a/E170 (48.5/48.0/3.5)
420AR-134a/142b (88.0/12.0)
421AR-125/134a (58.0/42.0)
421BR-125/134a (85.0/15.0)
422AR-125/134a/600a (85.1/11.5/3.4)
422BR-125/134a/600a (55.0/42.0/3.0)
422CR-125/134a/600a (82.0/15.0/3.0)
422DR-125/134a/600a (65.1/31.5/3.4)
422ER-125/134a/600a (58.0/39.3/2.7)
423A134a/227ea (52.5/47.5)
424AR-125/134a/600a/600/601a (50.5/47.0/0.9/1.0/0.6)
425AR-32/134a/227ea (18.5/69.5/12)
426AR-125/134a/600/601a (5.1/93.0/1.3/0.6)
427AR-32/125/143a/134a (15.0/25.0/10.0/50.0)
428AR-125/143a/290/600a (77.5/20.0/0.6/1.9)
429AR-E170/152a/600a (60.0/10.0/30.0)
430AR-152a/600a (76.0/24.0)
431AR-290/152a (71.0/29.0)
432AR-1270/E170 (80.0/20.0)
433AR-1270/290 (30.0/70.0)
433BR-1270/290 (5.0/95.0)
433CR-1270/290 (25.0/75.0)
434AR-125/143a/134a/600a
435AR-E170/152a (80.0/20.0)
436AR-290/600a (56.0/44.0)
436BR-290/600a (52.0/48.0)
437AR-125/134a/600/601 (19.5/78.5/1.4/0.6)
438AR-32/125/134a/600/601a (8.5/45.0/44.2/1.7/0.6)
439AR-32/125/600a (50.0/47.0/3.0)
440AR-290/134a/152a (0.6/1.6/97.8)
441AR-170/290/600a/600 (3.1/54.8/6.0/36.1)
442AR-32/125/134a/152a/227ea (31.0/31.0/30.0/3.0/5.0)
443AR-1270/290/600a (55.0/40.0/5.0)
444AR-32/152a/1234ze(E) (12.0/5.0/83.0)
445AR-744/134a/1234ze(E) (6.0/9.0/85.0)

Number
Refrigerant Composition (Mass % )
Azeotropes
500R-12/152a (73.8/26.2)
501R-22/12 (75.0/25.0)
502R-22/115 (48.8/51.2)
503R-23/13 (40.1/59.9)
504R-32/115 (48.2/51.8)
505R-12/31 (78.0/22.0)
506R-31/114 (55.1/44.9)
507AR-125/143a (50.0/50.0)
508AR-23/116 (39.0/61.0)
508BR-23/116 (46.0/54.0)
509AR-22/218 (44.0/56.0)
510AR-E170/600a (88.0/12.0)
511AR-290/152a (95.0/5.0)
512AR-134a/152a (5.0/95.0)

 

 

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