Refrigerant · HCFC

R-123 pressure-temperature chart and data

Dichlorotrifluoroethane. Safety class B1, GWP 77. Low-pressure centrifugal chillers (replaced R-11). Runs in a vacuum on the low side, so air and moisture leak in. Toxic: B1.

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R-123 data sheet

Name	Dichlorotrifluoroethane
Type	HCFC
Safety class	B1 — higher toxicity, does not burn
Ozone depletion (ODP)	0.02
Global warming (GWP, 100 yr)	77
Boils at 1 atm	82.1 °F (27.8 °C)
Critical temperature	362.6 °F (183.7 °C)
Temperature glide	none / very small
Low side at 5 °F evaporating	V 25.2 psig (-85 kPa)
High side at 86 °F condensing	1.2 psig (8 kPa)
Old cylinder colour	Light blue-gray
Oil	Mineral / AB
Used for	Low-pressure centrifugal chillers (replaced R-11). Runs in a vacuum on the low side, so air and moisture leak in. Toxic: B1.

Higher toxicity: leave the area at a leak and use the right respirator or gas detector.
Ozone-depleting: venting is illegal. Recover it and send it to a licensed reclaimer.

Pressures are saturation values from reference equations of state. Real pressures change with load and airflow. GWP is the IPCC AR4 100-year value (blends calculated from their ingredients). Cylinder colours were an old AHRI code; since 2020 new cylinders are all one colour with the name on the label, so always read the label, never go by colour.

R-123 pressure / temperature chart

°F	°C	psig	kPa
-40	-40.0	V 28.9	-98
-39	-39.4	V 28.8	-98
-38	-38.9	V 28.8	-97
-37	-38.3	V 28.7	-97
-36	-37.8	V 28.7	-97
-35	-37.2	V 28.6	-97
-34	-36.7	V 28.6	-97
-33	-36.1	V 28.6	-97
-32	-35.6	V 28.5	-97
-31	-35.0	V 28.5	-96
-30	-34.4	V 28.4	-96
-29	-33.9	V 28.4	-96
-28	-33.3	V 28.3	-96
-27	-32.8	V 28.2	-96
-26	-32.2	V 28.2	-95
-25	-31.7	V 28.1	-95
-24	-31.1	V 28.1	-95
-23	-30.6	V 28.0	-95
-22	-30.0	V 27.9	-95
-21	-29.4	V 27.9	-94
-20	-28.9	V 27.8	-94
-19	-28.3	V 27.7	-94
-18	-27.8	V 27.6	-94
-17	-27.2	V 27.6	-93
-16	-26.7	V 27.5	-93
-15	-26.1	V 27.4	-93
-14	-25.6	V 27.3	-93
-13	-25.0	V 27.2	-92
-12	-24.4	V 27.2	-92
-11	-23.9	V 27.1	-92
-10	-23.3	V 27.0	-91
-9	-22.8	V 26.9	-91
-8	-22.2	V 26.8	-91
-7	-21.7	V 26.7	-90
-6	-21.1	V 26.6	-90
-5	-20.6	V 26.5	-90
-4	-20.0	V 26.4	-89
-3	-19.4	V 26.3	-89
-2	-18.9	V 26.2	-89
-1	-18.3	V 26.0	-88
0	-17.8	V 25.9	-88
1	-17.2	V 25.8	-87
2	-16.7	V 25.7	-87
3	-16.1	V 25.6	-87
4	-15.6	V 25.4	-86
5	-15.0	V 25.3	-86
6	-14.4	V 25.1	-85
7	-13.9	V 25.0	-85
8	-13.3	V 24.9	-84
9	-12.8	V 24.7	-84
10	-12.2	V 24.6	-83
11	-11.7	V 24.4	-83
12	-11.1	V 24.3	-82
13	-10.6	V 24.1	-82
14	-10.0	V 23.9	-81
15	-9.4	V 23.8	-81
16	-8.9	V 23.6	-80
17	-8.3	V 23.4	-79
18	-7.8	V 23.3	-79
19	-7.2	V 23.1	-78
20	-6.7	V 22.9	-77
21	-6.1	V 22.7	-77
22	-5.6	V 22.5	-76
23	-5.0	V 22.3	-75
24	-4.4	V 22.1	-75
25	-3.9	V 21.9	-74
26	-3.3	V 21.7	-73
27	-2.8	V 21.4	-73
28	-2.2	V 21.2	-72
29	-1.7	V 21.0	-71
30	-1.1	V 20.8	-70
31	-0.6	V 20.5	-69
32	0.0	V 20.3	-69
33	0.6	V 20.0	-68
34	1.1	V 19.8	-67
35	1.7	V 19.5	-66
36	2.2	V 19.3	-65
37	2.8	V 19.0	-64
38	3.3	V 18.7	-63
39	3.9	V 18.4	-62
40	4.4	V 18.2	-62
41	5.0	V 17.9	-61
42	5.6	V 17.6	-60
43	6.1	V 17.3	-58
44	6.7	V 17.0	-57
45	7.2	V 16.7	-56
46	7.8	V 16.3	-55
47	8.3	V 16.0	-54
48	8.9	V 15.7	-53
49	9.4	V 15.3	-52
50	10.0	V 15.0	-51
51	10.6	V 14.6	-50
52	11.1	V 14.3	-48
53	11.7	V 13.9	-47
54	12.2	V 13.5	-46
55	12.8	V 13.2	-45
56	13.3	V 12.8	-43
57	13.9	V 12.4	-42
58	14.4	V 12.0	-41
59	15.0	V 11.6	-39
60	15.6	V 11.2	-38
61	16.1	V 10.8	-36
62	16.7	V 10.3	-35
63	17.2	V 9.9	-34
64	17.8	V 9.4	-32
65	18.3	V 9.0	-30
66	18.9	V 8.5	-29
67	19.4	V 8.1	-27
68	20.0	V 7.6	-26
69	20.6	V 7.1	-24
70	21.1	V 6.6	-22
71	21.7	V 6.1	-21
72	22.2	V 5.6	-19
73	22.8	V 5.1	-17
74	23.3	V 4.6	-16
75	23.9	V 4.0	-14
76	24.4	V 3.5	-12
77	25.0	V 3.0	-10
78	25.6	V 2.4	-8
79	26.1	V 1.8	-6
80	26.7	V 1.2	-4
81	27.2	V 0.7	-2
82	27.8	V 0.0	-0
83	28.3	0.3	2
84	28.9	0.6	4
85	29.4	0.9	6
86	30.0	1.2	8
87	30.6	1.5	10
88	31.1	1.8	13
89	31.7	2.2	15
90	32.2	2.5	17
91	32.8	2.8	20
92	33.3	3.2	22
93	33.9	3.5	24
94	34.4	3.9	27
95	35.0	4.2	29
96	35.6	4.6	32
97	36.1	5.0	34
98	36.7	5.3	37
99	37.2	5.7	39
100	37.8	6.1	42
101	38.3	6.5	45
102	38.9	6.9	48
103	39.4	7.3	50
104	40.0	7.7	53
105	40.6	8.1	56
106	41.1	8.5	59
107	41.7	9.0	62
108	42.2	9.4	65
109	42.8	9.8	68
110	43.3	10.3	71
111	43.9	10.7	74
112	44.4	11.2	77
113	45.0	11.7	80
114	45.6	12.1	84
115	46.1	12.6	87
116	46.7	13.1	90
117	47.2	13.6	94
118	47.8	14.1	97
119	48.3	14.6	100
120	48.9	15.1	104
121	49.4	15.6	108
122	50.0	16.1	111
123	50.6	16.6	115
124	51.1	17.2	119
125	51.7	17.7	122
126	52.2	18.3	126
127	52.8	18.8	130
128	53.3	19.4	134
129	53.9	20.0	138
130	54.4	20.6	142

V = vacuum in inches of mercury. Saturation pressure in psig at sea level, calculated from reference equations of state. The chart gives the boiling temperature at that pressure, not the pipe temperature. Air in the system adds pressure and throws it off.

R-123 pressure in psig, psia, kPa and bar

°F	°C	psig	psia	kPa gauge	kPa absolute	bar absolute
-40	-40.0	V 28.9	0.5	-98	4	0.04
-35	-37.2	V 28.6	0.6	-97	4	0.04
-30	-34.4	V 28.4	0.7	-96	5	0.05
-25	-31.7	V 28.1	0.9	-95	6	0.06
-20	-28.9	V 27.8	1.0	-94	7	0.07
-15	-26.1	V 27.4	1.2	-93	9	0.09
-10	-23.3	V 27.0	1.4	-91	10	0.10
-5	-20.6	V 26.5	1.7	-90	12	0.12
0	-17.8	V 25.9	2.0	-88	14	0.14
5	-15.0	V 25.3	2.3	-86	16	0.16
10	-12.2	V 24.6	2.6	-83	18	0.18
15	-9.4	V 23.8	3.0	-81	21	0.21
20	-6.7	V 22.9	3.5	-77	24	0.24
25	-3.9	V 21.9	4.0	-74	27	0.27
30	-1.1	V 20.8	4.5	-70	31	0.31
35	1.7	V 19.5	5.1	-66	35	0.35
40	4.4	V 18.2	5.8	-62	40	0.40
45	7.2	V 16.7	6.5	-56	45	0.45
50	10.0	V 15.0	7.3	-51	51	0.51
55	12.8	V 13.2	8.2	-45	57	0.57
60	15.6	V 11.2	9.2	-38	63	0.63
65	18.3	V 9.0	10.3	-30	71	0.71
70	21.1	V 6.6	11.4	-22	79	0.79
75	23.9	V 4.0	12.7	-14	88	0.88
80	26.7	V 1.2	14.1	-4	97	0.97
85	29.4	0.9	15.6	6	107	1.07
90	32.2	2.5	17.2	17	119	1.19
95	35.0	4.2	18.9	29	131	1.31
100	37.8	6.1	20.8	42	143	1.43
105	40.6	8.1	22.8	56	157	1.57
110	43.3	10.3	25.0	71	172	1.72
115	46.1	12.6	27.3	87	188	1.88
120	48.9	15.1	29.8	104	205	2.05
125	51.7	17.7	32.4	122	224	2.24
130	54.4	20.6	35.3	142	243	2.43

V = vacuum in inches of mercury. Absolute pressure = gauge + 14.7 psi at sea level; use absolute pressure for gas-law work. For blends the dew column is the vapour (suction) side and the bubble column the liquid side.

Other refrigerants

R-11 R-12 R-22 R-23 R-32 R-125 R-134a R-143a R-152a R-170 R-245fa R-290 R-401A R-401B R-404A R-407A R-407C R-407F R-408A R-409A R-410A R-417A R-422A R-422D R-427A R-448A R-449A R-450A R-452A R-452B R-454A R-454B R-454C R-455A R-500 R-502 R-507A R-508B R-513A R-600 R-600a R-717 R-744 R-1233zd(E) R-1234yf R-1234ze(E) R-1270

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Calculation aids and reference figures for licensed technicians. Always follow the manufacturer’s data plate and manual for the exact model, and local codes. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Pressures are typical saturation values and change with load and airflow.