Chemical refrigerants are assigned an R number (sometimes the label replaces it with the word Freon) which is determined systematically according to molecular structure. The following is a list of refrigerants with their ASHRAE designated numbers, IUPAC chemical name, molecular formula, and CAS number.

ASHRAE Number	Name	Formula	CAS number	GWP
R-10	Tetrachloromethane	CCl4	56-23-5
R-11	Trichlorofluoromethane	CCl3F	75-69-4
R-12	Dichlorodifluoromethane	CCl2F2	75-71-8
R-12B1	Bromochlorodifluoromethane	CBrClF2	353-59-3
R-12B2	Dibromodifluoromethane	CBr2F2	75-61-6
R-13	Chlorotrifluoromethane	CClF3	75-72-9
R-13B1	Bromotrifluoromethane	CF3Br	75-63-8
R-14	Tetrafluoromethane	CF4	75-73-0
R-20	Trichloromethane	CHCl3	67-66-3
R-21	Dichlorofluoromethane	CHFCl2	75-43-4
R-22	Chlorodifluoromethane	CHClF2	75-45-6	1700
R-22B1	Bromodifluoromethane	CHBrF2	1511-62-2
R-23	Trifluoromethane	CHF3	75-46-7	11,700
R-30	Dichloromethane	CH2Cl2	75-09-2
R-31	Chlorofluoromethane	CH2FCl	593-70-4
R-32	Difluoromethane	CH2F2	75-10-5	650
R-40	Chloromethane	CH3Cl	74-87-3
R-41	Fluoromethane	CH3F	593-53-3	150
R-50	Methane	CH4	74-82-8
R-110	Hexachloroethane	C2Cl6	67-72-1
R-111	Pentachlorofluoroethane	C2FCl5	354-56-3
R-112	1,1,2,2-Tetrachloro-1,2-difluoroethane	C2F2Cl4	76-12-0
R-112a	1,1,1,2-Tetrachloro-2,2-difluoroethane	C2F2Cl4	76-11-9
R-113	1,1,2-Trichlorotrifluoroethane	C2F3Cl3	76-13-1
R-113a	1,1,1-Trichlorotrifluoroethane	C2F3Cl3	354-58-5
R-114	1,2-Dichlorotetrafluoroethane	C2F4Cl2	76-14-2
R-114a	1,1-Dichlorotetrafluoroethane	C2F4Cl2	374-07-2
R-114B2	Dibromotetrafluoroethane	C2F4Br2	124-73-2
R-115	Chloropentafluoroethane	C2F5Cl	76-15-3
R-116	Hexafluoroethane	C2F6	76-16-4
R-120	Pentachloroethane	C2HCl5	76-01-7
R-121	1,1,2,2-Tetrachloro-1-fluoroethane	C2HFCl4	354-14-3
R-121a	1,1,1,2-Tetrachloro-2-fluoroethane	C2HFCl4	354-11-0
R-122	1,1,2-Trichloro-2,2-difluoroethane	C2HF2Cl3	354-21-2
R-122a	1,1,2-Trichloro-1,2-difluoroethane	C2HF2Cl3	354-15-4
R-122b	1,1,1-Trichloro-2,2-difluoroethane	C2HF2Cl3	354-12-1
R-123	2,2-Dichloro-1,1,1-trifluoroethane	C2HF3Cl2	306-83-2
R-123a	1,2-Dichloro-1,1,2-trifluoroethane	C2HF3Cl2	354-23-4
R-123b	1,1-Dichloro-1,2,2-trifluoroethane	C2HF3Cl2	812-04-4
R-124	2-Chloro-1,1,1,2-tetrafluoroethane	C2HF4Cl	2837-89-0
R-124a	1-Chloro-1,1,2,2-tetrafluoroethane	C2HF4Cl	354-25-6
R-125	Pentafluoroethane	C2HF5	354-33-6	2,800
R-E125	(Difluoromethoxy)(trifluoro)methane	C2HF5O	3822-68-2
R-130	1,1,2,2-Tetrachloroethane	C2H2Cl4	79-34-5
R-130a	1,1,1,2-Tetrachloroethane	C2H2Cl4	630-20-6
R-131	1,1,2-trichloro-2-fluoroethane	C2H2FCl3	359-28-4
R-131a	1,1,2-trichloro-1-fluoroethane	C2H2FCl3	811-95-0
R-131b	1,1,1-trichloro-2-fluoroethane	C2H2FCl3	2366-36-1
R-132	Dichlorodifluoroethane	C2H2F2Cl2	25915-78-0
R-132a	1,1-Dichloro-2,2-difluoroethane	C2H2F2Cl2	471-43-2
R-132b	1,2-Dichloro-1,1-difluoroethane	C2H2F2Cl2	1649-08-7
R-132c	1,1-Dichloro-1,2-difluoroethane	C2H2F2Cl2	1842-05-3
R-132bB2	1,2-Dibromo-1,1-difluoroethane	C2H2Br2F2	75-82-1
R-133	1-Chloro-1,2,2-Trifluoroethane	C2H2F3Cl	431-07-2
R-133a	1-Chloro-2,2,2-Trifluoroethane	C2H2F3Cl	75-88-7
R-133b	1-Chloro-1,1,2-Trifluoroethane	C2H2F3Cl	421-04-5
R-134	1,1,2,2-Tetrafluoroethane	C2H2F4	359-35-3	1,000
R-134a	1,1,1,2-Tetrafluoroethane	C2H2F4	811-97-2	1,300
R-E134	Bis(difluoromethyl)ether	C2H2F4O	1691-17-4
R-140	1,1,2-Trichloroethane	C2H3Cl3	79-00-5
R-140a	1,1,1-Trichloroethane	C2H3Cl3	71-55-6
R-141	1,2-Dichloro-1-fluoroethane	C2H3FCl2	430-57-9
R-141B2	1,2-Dibromo-1-fluoroethane	C2H3Br2F	358-97-4
R-141a	1,1-Dichloro-2-fluoroethane	C2H3FCl2	430-53-5
R-141b	1,1-Dichloro-1-fluoroethane	C2H3FCl2	1717-00-6
R-142	Chlorodifluoroethane	C2H3F2Cl	25497-29-4
R-142a	1-Chloro-1,2-difluoroethane	C2H3F2Cl	25497-29-4
R-142b	1-Chloro-1,1-difluoroethane	C2H3F2Cl	75-68-3
R-143	1,1,2-Trifluoroethane	C2H3F3	430-66-0	300
R-143a	1,1,1-Trifluoroethane	C2H3F3	420-46-2	3,800
R-143m	Methyl trifluoromethyl ether	C2H3F3O	421-14-7
R-E143a	2,2,2-Trifluoroethyl methyl ether	C3H5F3O	460-43-5
R-150	1,2-Dichloroethane	C2H4Cl2	107-06-2
R-150a	1,1-Dichloroethane	C2H4Cl2	75-34-3
R-151	Chlorofluoroethane	C2H4ClF	110587-14-9
R-151a	1-Chloro-1-fluoroethane	C2H4ClF	1615-75-4
R-152	1,2-Difluoroethane	C2H4F2	624-72-6
R-152a	1,1-Difluoroethane	C2H4F2	75-37-6	140
R-160	Chloroethane	C2H5Cl	75-00-3
R-161	Fluoroethane	C2H5F	353-36-6
R-170	Ethane	C2H6	74-84-0
R-211	1,1,1,2,2,3,3-Heptachloro-3-fluoropropane	C3FCl7	422-78-6
R-212	Hexachlorodifluoropropane	C3F2Cl6	76546-99-3
R-213	1,1,1,3,3-Pentachloro-2,2,3-trifluoropropane	C3F3Cl5	2354-06-5
R-214	1,2,2,3-Tetrachloro-1,1,3,3-tetrafluoropropane	C3F4Cl4	2268-46-4
R-215	1,1,1-Trichloro-2,2,3,3,3-pentafluoropropane	C3F5Cl3	4259-43-2
R-216	1,2-Dichloro-1,1,2,3,3,3-hexafluoropropane	C3F6Cl2	661-97-2
R-216ca	1,3-Dichloro-1,1,2,2,3,3-hexafluoropropane	C3F6Cl2	662-01-1
R-217	1-Chloro-1,1,2,2,3,3,3-heptafluoropropane	C3F7Cl	422-86-6
R-217ba	2-Chloro-1,1,1,2,3,3,3-heptafluoropropane	C3F7Cl	76-18-6
R-218	Octafluoropropane	C3F8	76-19-7
R-221	1,1,1,2,2,3-Hexachloro-3-fluoropropane	C3HFCl6	422-26-4
R-222	Pentachlorodifluoropropane	C3HF2Cl5	134237-36-8
R-222c	1,1,1,3,3-Pentachloro-2,2-difluoropropane	C3HF2Cl5	422-49-1
R-223	Tetrachlorotrifluoropropane	C3HF3Cl4	134237-37-9
R-223ca	1,1,3,3-Tetrachloro-1,2,2-trifluoropropane	C3HF3Cl4	422-52-6
R-223cb	1,1,1,3-Tetrachloro-2,2,3-trifluoropropane	C3HF3Cl4	422-50-4
R-224	Trichlorotetrafluoropropane	C3HF4Cl3	134237-38-0
R-224ca	1,3,3-Trichloro-1,1,2,2-tetrafluoropropane	C3HF4Cl3	422-54-8
R-224cb	1,1,3-Trichloro-1,2,2,3-tetrafluoropropane	C3HF4Cl3	422-53-7
R-224cc	1,1,1-Trichloro-2,2,3,3-tetrafluoropropane	C3HF4Cl3	422-51-5
R-225	Dichloropentafluoropropane	C3HF5Cl2	127564-92-5
R-225aa	2,2-Dichloro-1,1,1,3,3-pentafluoropropane	C3HF5Cl2	128903-21-9
R-225ba	2,3-Dichloro-1,1,1,2,3-pentafluoropropane	C3HF5Cl2	422-48-0
R-225bb	1,2-Dichloro-1,1,2,3,3-pentafluoropropane	C3HF5Cl2	422-44-6
R-225ca	3,3-Dichloro-1,1,1,2,2-pentafluoropropane	C3HF5Cl2	422-56-0
R-225cb	1,3-Dichloro-1,1,2,2,3-pentafluoropropane	C3HF5Cl2	507-55-1
R-225cc	1,1-Dichloro-1,2,2,3,3-pentafluoropropane	C3HF5Cl2	13474-88-9
R-225da	1,2-Dichloro-1,1,3,3,3-pentafluoropropane	C3HF5Cl2	431-86-7
R-225ea	1,3-Dichloro-1,1,2,3,3-pentafluoropropane	C3HF5Cl2	136013-79-1
R-225eb	1,1-Dichloro-1,2,3,3,3-pentafluoropropane	C3HF5Cl2	111512-56-2
R-226	Chlorohexafluoropropane	C3HF6Cl	134308-72-8
R-226ba	2-Chloro-1,1,1,2,3,3-hexafluoropropane	C3HF6Cl	51346-64-6
R-226ca	3-Chloro-1,1,1,2,2,3-hexafluoropropane	C3HF6Cl	422-57-1
R-226cb	1-Chloro-1,1,2,2,3,3-hexafluoropropane	C3HF6Cl	422-55-9
R-226da	2-Chloro-1,1,1,3,3,3-hexafluoropropane	C3HF6Cl	431-87-8
R-226ea	1-Chloro-1,1,2,3,3,3-hexafluoropropane	C3HF6Cl	359-58-0
R-227ca	1,1,2,2,3,3,3-Heptafluoropropane	C3HF7	2252-84-8
R-227ca2	Trifluoromethyl 1,1,2,2-tetrafluoroethyl ether	C3HF7O	2356-61-8
R-227ea	1,1,1,2,3,3,3-Heptafluoropropane	C3HF7	431-89-0	2,900
R-227me	Trifluoromethyl 1,2,2,2-tetrafluoroethyl ether	C3HF7O	2356-62-9
R-231	Pentachlorofluoropropane	C3H2FCl5	134190-48-0
R-232	Tetrachlorodifluoropropane	C3H2F2Cl4	134237-39-1
R-232ca	1,1,3,3-Tetrachloro-2,2-difluoropropane	C3H2F2Cl4	1112-14-7
R-232cb	1,1,1,3-Tetrachloro-2,2-difluoropropane	C3H2F2Cl4	677-54-3
R-233	Trichlorotrifluoropropane	C3H2F3Cl3	134237-40-4
R-233ca	1,1,3-Trichloro-2,2,3-trifluoropropane	C3H2F3Cl3	131221-36-8
R-233cb	1,1,3-Trichloro-1,2,2-trifluoropropane	C3H2F3Cl3	421-99-8
R-233cc	1,1,1-Trichloro-2,2,3-trifluoropropane	C3H2F3Cl3	131211-71-7
R-234	Dichlorotetrafluoropropane	C3H2F4Cl2	127564-83-4
R-234aa	2,2-Dichloro-1,1,3,3-tetrafluoropropane	C3H2F4Cl2	17705-30-5
R-234ab	2,2-Dichloro-1,1,1,3-tetrafluoropropane	C3H2F4Cl2	149329-24-8
R-234ba	1,2-Dichloro-1,2,3,3-tetrafluoropropane	C3H2F4Cl2	425-94-5
R-234bb	2,3-Dichloro-1,1,1,2-tetrafluoropropane	C3H2F4Cl2	149329-25-9
R-234bc	1,2-Dichloro-1,1,2,3-tetrafluoropropane	C3H2F4Cl2	149329-26-0
R-234ca	1,3-Dichloro-1,2,2,3-tetrafluoropropane	C3H2F4Cl2	70341-81-0
R-234cb	1,1-Dichloro-2,2,3,3-tetrafluoropropane	C3H2F4Cl2	4071-01-6
R-234cc	1,3-Dichloro-1,1,2,2-tetrafluoropropane	C3H2F4Cl2	422-00-5
R-234cd	1,1-Dichloro-1,2,2,3-tetrafluoropropane	C3H2F4Cl2	70192-63-1
R-234da	2,3-Dichloro-1,1,1,3-tetrafluoropropane	C3H2F4Cl2	146916-90-7
R-234fa	1,3-Dichloro-1,1,3,3-tetrafluoropropane	C3H2F4Cl2	76140-39-1
R-234fb	1,1-Dichloro-1,3,3,3-tetrafluoropropane	C3H2F4Cl2	64712-27-2
R-235	Chloropentafluoropropane	C3H2F5Cl	134237-41-5
R-235ca	1-Chloro-1,2,2,3,3-pentafluoropropane	C3H2F5Cl	28103-66-4
R-235cb	3-Chloro-1,1,1,2,3-pentafluoropropane	C3H2F5Cl	422-02-6
R-235cc	1-Chloro-1,1,2,2,3-pentafluoropropane	C3H2F5Cl	679-99-2
R-235da	2-Chloro-1,1,1,3,3-pentafluoropropane	C3H2F5Cl	134251-06-2
R-235fa	1-Chloro-1,1,3,3,3-pentafluoropropane	C3H2F5Cl	677-55-4
R-236cb	1,1,1,2,2,3-Hexafluoropropane	C3H2F6	677-56-5
R-236ea	1,1,1,2,3,3-Hexafluoropropane	C3H2F6	431-63-0
R-236fa	1,1,1,3,3,3-Hexafluoropropane	C3H2F6	690-39-1	6,300
R-236me	1,2,2,2-Tetrafluoroethyl difluoromethyl ether	C3H2F6O	57041-67-5
R-FE-36	Hexafluoropropane	C3H2F6	359-58-0
R-241	Tetrachlorofluoropropane	C3H3FCl4	134190-49-1
R-242	Trichlorodifluoropropane	C3H3F2Cl3	134237-42-6
R-243	Dichlorotrifluoropropane	C3H3F3Cl2	134237-43-7
R-243ca	1,3-Dichloro-1,2,2-trifluoropropane	C3H3F3Cl2	67406-68-2
R-243cb	1,1-Dichloro-2,2,3-trifluoropropane	C3H3F3Cl2	70192-70-0
R-243cc	1,1-Dichloro-1,2,2-trifluoropropane	C3H3F3Cl2	7125-99-7
R-243da	2,3-Dichloro-1,1,1-trifluoropropane	C3H3F3Cl2	338-75-0
R-243ea	1,3-Dichloro-1,2,3-trifluoropropane	C3H3F3Cl2	151771-08-3
R-243ec	1,3-Dichloro-1,1,2-trifluoropropane	C3H3F3Cl2	149329-27-1
R-244	Chlorotetrafluoropropane	C3H3F4Cl	134190-50-4
R-244ba	2-Chloro-1,2,3,3-tetrafluoropropane	C3H3F4Cl
R-244bb	2-Chloro-1,1,1,2-tetrafluoropropane	C3H3F4Cl	421-73-8
R-244ca	3-Chloro-1,1,2,2-tetrafluoropropane	C3H3F4Cl	679-85-6
R-244cb	1-Chloro-1,2,2,3-tetrafluoropropane	C3H3F4Cl	67406-66-0
R-244cc	1-Chloro-1,1,2,2-tetrafluoropropane	C3H3F4Cl	421-75-0
R-244da	2-Chloro-1,1,3,3-tetrafluoropropane	C3H3F4Cl	19041-02-2
R-244db	2-Chloro-1,1,1,3-tetrafluoropropane	C3H3F4Cl	117970-90-8
R-244ea	3-Chloro-1,1,2,3-tetrafluoropropane	C3H3F4Cl
R-244eb	1-Chloro-1,1,1,2-tetrafluoropropane	C3H3F4Cl
R-244ec	1-Chloro-1,1,2,3-tetrafluoropropane	C3H3F4Cl
R-244fa	3-Chloro-1,1,1,3-tetrafluoropropane	C3H3F4Cl
R-244fb	1-Chloro-1,1,3,3-tetrafluoropropane	C3H3F4Cl	2730-64-5
R-245ca	1,1,2,2,3-Pentafluoropropane	C3H3F5	679-86-7	560
R-245cb	Pentafluoropropane	C3H3F5	1814-88-6
R-245ea	1,1,2,3,3-Pentafluoropropane	C3H3F5	24270-66-4
R-245eb	1,1,1,2,3-Pentafluoropropane	C3H3F5	431-31-2
R-245fa	1,1,1,3,3-Pentafluoropropane	C3H3F5	460-73-1	900
R-245mc	Methyl pentafluoroethyl ether	C3H3F5O	22410-44-2
R-245mf	Difluoromethyl 2,2,2-trifluoroethyl ether	C3H3F5O	1885-48-9
R-245qc	Difluoromethyl 1,1,2-trifluoroethyl ether	C3H3F5O	69948-24-9
R-251	Trichlorofluoropropane	C3H4FCl3	134190-51-5
R-252	Dichlorodifluoropropane	C3H4F2Cl2	134190-52-6
R-252ca	1,3-Dichloro-2,2-difluoropropane	C3H4F2Cl2	1112-36-3
R-252cb	1,1-Dichloro-2,2-difluoropropane	C3H4F2Cl2	1112-01-2
R-252dc	1,2-Dichloro-1,1-difluoropropane	C3H4F2Cl2
R-252ec	1,1-Dichloro-1,2-difluoropropane	C3H4F2Cl2
R-253	Chlorotrifluoropropane	C3H4F3Cl	134237-44-8
R-253ba	2-Chloro-1,2,3-trifluoropropane	C3H4F3Cl
R-253bb	2-Chloro-1,1,2-trifluoropropane	C3H4F3Cl
R-253ca	1-Chloro-2,2,3-trifluoropropane	C3H4F3Cl	56758-54-4
R-253cb	1-Chloro-1,2,2-trifluoropropane	C3H4F3Cl	70192-76-6
R-253ea	3-Chloro-1,1,2-trifluoropropane	C3H4F3Cl
R-253eb	1-Chloro-1,2,3-trifluoropropane	C3H4F3Cl
R-253ec	1-Chloro-1,1,2-trifluoropropane	C3H4F3Cl
R-253fa	3-Chloro-1,3,3-trifluoropropane	C3H4F3Cl
R-253fb	3-Chloro-1,1,1-trifluoropropane	C3H4F3Cl	460-35-5
R-253fc	1-Chloro-1,1,3-trifluoropropane	C3H4F3Cl
R-254cb	1,1,2,2-Tetrafluoropropane	C3H4F4	40723-63-5
R-254pc	Methyl 1,1,2,2-tetrafluoroethyl ether	C3H4F4O	425-88-7
R-261	Dichlorofluoropropane	C3H5FCl2	134237-45-9
R-261ba	1,2-Dichloro-2-fluoropropane	C3H5FCl2	420-97-3
R-262	Chlorodifluoropropane	C3H5F2Cl	134190-53-7
R-262ca	1-Chloro-2,2-difluoropropane	C3H5F2Cl	420-99-5
R-262fa	3-Chloro-1,1-difluoropropane	C3H5F2Cl
R-262fb	1-Chloro-1,3-difluoropropane	C3H5F2Cl
R-263	Trifluoropropane	C3H5F3
R-271	Chlorofluoropropane	C3H6FCl	134190-54-8
R-271b	2-Chloro-2-fluoropropane	C3H6FCl	420-44-0
R-271d	2-Chloro-1-fluoropropane	C3H6FCl
R-271fb	1-Chloro-1-fluoropropane	C3H6FCl
R-272	Difluoropropane	C3H6F2
R-281	Fluoropropane	C3H7F
R-290	Propane	C3H8	74-98-6
R-C316	Dichlorohexafluorocyclobutane	C4Cl2F6	356-18-3
R-C317	Chloroheptafluorocyclobutane	C4ClF7	377-41-3
R-C318	Octafluorocyclobutane	C4F8	115-25-3
R-3-1-10	Decafluorobutane	C4F10
R-329ccb			375-17-7
R-338eea			75995-72-1
R-347ccd			662-00-0
R-347mcc	Perfluoropropyl methyl ether	C4H3F7O	375-03-1
R-347mmy	Perfluoroisopropyl methyl ether	C4H3F7O	22052-84-2
R-356mcf
R-356mffm
R-365mfc	1,1,1,3,3-Pentafluorobutane	C4H5F5
FC-72	Tetradecafluorohexane	C6F14	355-42-0
R-400	R-12/R-114 (60/40 wt%)	binary blend
R-401A	R-22/R-152a/R-124 (53/13/34)			18
R-401B	R-22/R-152a/R-124 (61/11/28)			15
R-401C	R-22/R-152a/R-124 (33/15/52)			21
R-402A	R-125/R-290/R-22 (60/2/38)			1,680
R-402B	R-125/R-290/R-22 (38/2/60)			1,064
R-403A	R-290/R-22/R-218 (5/75/20)			1,400
R-403B	R-290/R-22/R-218 (5/56/39)			2,730
R-404A	R-125/R-143a/R-134a (44/52/4)			3,260
R-405A	R-22/R-152a/R-142b/R-C318 (45/7/5.5/42.5)
R-406A	R-22/R-600a/R-142b (55/04/41)			0
R-407A	R-32/R-125/R-134a (20/40/40)			1,770
R-407B	R-32/R-125/R-134a (10/70/20)			2,285
R-407C	R-32/R-125/R-134a (23/25/52)			1,526
R-407D	R-32/R-125/R-134a (15/15/70)			1,428
R-407E	R-32/R-125/R-134a (25/15/60)			1,363
R-408A	R-125/R-143a/R-22 (7/46/47)			1,944
R-409A	R-22/R-124/R-142b (60/25/15)			0
R-409B	R-22/R-124/R-142b (65/25/10)			0
R-410A	R-32/R-125 (50/50)			1,725
R-410B	R-32/R-125 (45/55)			1,833
R-411A	R-1270/R-22/R-152a (1.5/87.5/11)			15
R-411B	R-1270/R-22/R-152a (3/94/3)			4
R-412A	R-22/R-218/R-142b (70/5/25)			350
R-413A	R-218/R-134a/R-600a (9/88/3)			1,774
R-414A	R-22/R-124/R-600a/R-142b (51/28.5/4.0/16.5)			0
R-414B	R-22/R-124/R-600a/R-142b (50/39/1.5/9.5)			0
R-415A	R-22/R-152a (82/18)			25
R-415B	R-22/R-152a (25/75)			105
R-416A	R-134a/R-124/R-600 (59/39.5/1.5)			767
R-417A	R-125/R-134a/R-600 (46.6/50.0/3.4)			1,955
R-418A	R-290/R-22/R-152a (1.5/96/2.5)			4
R-419A	R-125/R-134a/R-E170 (77/19/4)			2,403
R-420A	R-134a/R-142b (88/12)			1,144
R-421A	R-125/R-134a (58/42)
R-421B	R-125/R-134a (85/15)
R-422A	R-125/R-134a/R-600a (85.1/11.5/3.4)
R-422B	R-125/R-134a/R-600a (55/42/3)
R-422C	R-125/R-134a/R-600a (82/15/3)
R-422D	R-125/R-134a/R-600a (65.1/31.5/3.4)
R-423A	R-134a/R-227ea (52.5/47.5)
R-424A	R-125/R-134a/R-600a/R-600/R-601a (50.5/47/.9/1/.6)
R-425A	R-32/R-134a/R-227ea (18.5/69.5/12)
R-426A	R-125/R-134a/R-600/R-601a (5.1/93/1.3/.6)
R-427A	R-32/R-125/R-143a/R-134a (15/25/10/50)
R-428A	R-125/R-143a/R-290/R-600a (77.5/20/.6/1.9)
R-500	R-12/R-152a (73.8/26.2)			37
R-501	R-22/R-12 (75/25)			0
R-502	R-22/R-115 (48.8/51.2)			0
R-503	R-23/R-13 (40.1/59.9)			4,692
R-504	R-32/R-115 (48.2/51.8)			313
R-505	R-12/R-31 (78/22)			0
R-506	R-31/R-114 (55.1/44.9)			0
R-507A	R-125/R-143a (50/50)			3,300
R-508A	R-23/R-116 (39/61)			10,175
R-508B	R-23/R-116 (46/54)			10,350
R-509A	R-22/R-218 (44/56)			3,920
R-600	Butane	CH3CH2CH2CH3	106-97-8
R-600a	Isobutane	CH(CH3)2CH3	75-28-5
R-601	Pentane	CH3CH2CH2CH2CH3	109-66-0
R-601a	Isopentane	(CH3)2CHCH2CH3	78-78-4
R-610	Diethyl ether	C2H5OC2H5	60-29-7
R-611	Methyl formate	C2H4O	107-31-3
R-630	Methylamine	CH2NH2	74-89-5
R-631	Ethylamine	C2H5NH2	75-04-7
R-702	Hydrogen	H2	1333-74-0
R-704	Helium	He	7440-59-7
R-717	Ammonia	NH3	7664-41-7
R-718	Water	H2O	7732-18-5
R-720	Neon	Ne	7440-01-9
R-728	Nitrogen	N2	7727-37-9
R-732	Oxygen	O2	7782-44-7
R-740	Argon	Ar	7440–37–1
R-744	Carbon dioxide	CO2	124-38-9	1
R-744A	Nitrous oxide	N2O	10024-97-2
R-764	Sulfur dioxide	SO2	7446-09-5
R-784	Krypton	Kr	7439-90-9
R-1112a	1,1-Dichloro-2,2-difluoroethylene	C2Cl2F2	79-35-6
R-1113	Chlorotrifluoroethylene	C2ClF3	79-38-9
R-1114	Tetrafluoroethylene	C2F4	116-14-3
R-1120	Trichloroethylene	C2HCl3	79-01-6
R-1130	cis-1,2-Dichloroethylene	C2H2Cl2	156-59-2
R-1132	1,1-Difluoroethylene	C2H2F2	75-38-7
R-1140	Chloroethylene	C2H3Cl	75-01-4
R-1141	Fluoroethylene	C2H3F	75-02-5
R-1150	Ethylene	C2H4	74-85-1
R-1216	Hexafluoropropylene	C3F6	116-15-4
R-	Hexafluoropropene trimer	(C3F6)3	6792-31-0
R-1270	Propylene	C3H6	115-07-1

[edit] See also

• Haloalkane

[edit] External links

• Numbering Scheme for Ozone-Depleting Substances and their Substitutes, epa.gov