RefrigerantASHRAE R-152a

R152a PT Chart

Q: What's R-152a's GWP?

124 — low for an HFC. The short atmospheric lifetime (~1.4 years) drives the relatively low GWP. R-152a's low GWP is favorable, but the A2 flammability classification limits commercial refrigeration adoption.

Q: Is R-152a flammable?

Yes — ASHRAE class A2 (flammable, more so than A2L). A2 refrigerants have higher burning velocity than A2L and require stricter equipment-design accommodations.

Updated October 12, 2026

R-152a

A2 Lower toxicity, flammableHFC (pure) AIM Act HFC

Illustration of a refrigerant cylinder painted light green gray (RAL 7044), the color AHRI Guideline N-2017 calls for on all new refrigerant containers from 2020^{[4], section 4.8}. Label: R-152a, safety class A2, GWP 124. Red band on the shoulder: AHRI Guideline N-2017 calls for one on containers of flammable refrigerants^{[4], section 4.7}.

CH3CHF2

Pure HFC (1,1-difluoroethane, CHF₂CH₃) — A2 flammable, GWP 124 (low for HFC). Primarily used as aerosol propellant and foam blowing agent rather than refrigerant. Limited refrigeration use due to A2 flammability classification.

R-152a saturation pressure is 30.1 PSIG at 40°F, 62.3 PSIG at 70°F, and 109.5 PSIG at 100°F. These are the gauge readings on a static, fully-saturated system; a running system's high side sits well above them. The full table below runs from −40°F to 150°F in 1°F steps.

Not yet checked against an independent source.

Saturation @ 70°F

62.3 PSIG

GWP (100-yr)

124 AIM Act exchange value (IPCC AR4)

Boiling point

−11.2°F

Sourced facts

ASHRAE safety class: A2^[1]
Chemical formula: CHF₂CH₃^[1]
GWP (100-yr): 124
ODP: 0^[1]
Normal boiling point: −11.2°F (−24.0°C)^[2]
Primary applications: Aerosol / foam

R-152a PT calculator Superheat

R-152a PT chart — printable saturation table

Looking for the R-152a PT chart PDF for shop reference? The complete pressure-temperature saturation table is below: every 1° increment from −40°F to 150°F (or to the refrigerant's critical temperature). Use the Print / Save as PDF button in the table header to download a clean, table-only PDF (the rest of the page is hidden from the print output).

R-152a PT Chart — Pressure-Temperature Saturation Table

Computed with CoolProp 7.2.0 in 1°F steps · hvacptcharts.com

R-152a · 1° increments · °F / PSIG

Tinted rows: NBP atmospheric crossover · 32°F H₂O freeze

R-152a pressure-temperature saturation table in Fahrenheit and PSIG
Temp (°F)	Pressure (PSIG)
−40°F	16.0 in. Hg vac.
−39°F	15.6 in. Hg vac.
−38°F	15.2 in. Hg vac.
−37°F	14.7 in. Hg vac.
−36°F	14.3 in. Hg vac.
−35°F	13.9 in. Hg vac.
−34°F	13.4 in. Hg vac.
−33°F	12.9 in. Hg vac.
−32°F	12.5 in. Hg vac.
−31°F	12.0 in. Hg vac.
−30°F	11.5 in. Hg vac.
−29°F	11.0 in. Hg vac.
−28°F	10.5 in. Hg vac.
−27°F	9.9 in. Hg vac.
−26°F	9.4 in. Hg vac.
−25°F	8.9 in. Hg vac.
−24°F	8.3 in. Hg vac.
−23°F	7.7 in. Hg vac.
−22°F	7.1 in. Hg vac.
−21°F	6.5 in. Hg vac.
−20°F	5.9 in. Hg vac.
−19°F	5.3 in. Hg vac.
−18°F	4.7 in. Hg vac.
−17°F	4.0 in. Hg vac.
−16°F	3.3 in. Hg vac.
−15°F	2.7 in. Hg vac.
−14°F	2.0 in. Hg vac.
−13°F	1.3 in. Hg vac.
−12°F	0.6 in. Hg vac.
−11°F NBP (atmospheric)	0.1
−10°F	0.5
−9°F	0.8
−8°F	1.2
−7°F	1.6
−6°F	2.0
−5°F	2.4
−4°F	2.8
−3°F	3.2
−2°F	3.7
−1°F	4.1
0°F	4.5
1°F	5.0
2°F	5.4
3°F	5.9
4°F	6.4
5°F	6.9
6°F	7.4
7°F	7.9
8°F	8.4
9°F	8.9
10°F	9.4
11°F	10.0
12°F	10.5
13°F	11.1
14°F	11.6
15°F	12.2
16°F	12.8
17°F	13.4
18°F	14.0
19°F	14.6
20°F	15.2
21°F	15.9
22°F	16.5
23°F	17.2
24°F	17.8
25°F	18.5
26°F	19.2
27°F	19.9
28°F	20.6
29°F	21.4
30°F	22.1
31°F	22.8
32°F H₂O freeze	23.6
33°F	24.4
34°F	25.1
35°F	25.9
36°F	26.7
37°F	27.6
38°F	28.4
39°F	29.2
40°F	30.1
41°F	31.0
42°F	31.8
43°F	32.7
44°F	33.6
45°F	34.6
46°F	35.5
47°F	36.4
48°F	37.4
49°F	38.4
50°F	39.4
51°F	40.4
52°F	41.4
53°F	42.4
54°F	43.5
55°F	44.5
56°F	45.6
57°F	46.7
58°F	47.8
59°F	48.9
60°F	50.1
61°F	51.2
62°F	52.4
63°F	53.5
64°F	54.7
65°F	56.0
66°F	57.2
67°F	58.4
68°F	59.7
69°F	61.0
70°F	62.3
71°F	63.6
72°F	64.9
73°F	66.3
74°F	67.6
75°F	69.0
76°F	70.4
77°F	71.8
78°F	73.2
79°F	74.7
80°F	76.2
81°F	77.6
82°F	79.1
83°F	80.7
84°F	82.2
85°F	83.8
86°F	85.4
87°F	87.0
88°F	88.6
89°F	90.2
90°F	91.9
91°F	93.5
92°F	95.2
93°F	97.0
94°F	98.7
95°F	100.4
96°F	102.2
97°F	104.0
98°F	105.8
99°F	107.7
100°F	109.5
101°F	111.4
102°F	113.3
103°F	115.2
104°F	117.2
105°F	119.1
106°F	121.1
107°F	123.1
108°F	125.2
109°F	127.2
110°F	129.3
111°F	131.4
112°F	133.5
113°F	135.7
114°F	137.9
115°F	140.0
116°F	142.3
117°F	144.5
118°F	146.8
119°F	149.1
120°F	151.4
121°F	153.7
122°F	156.1
123°F	158.5
124°F	160.9
125°F	163.3
126°F	165.8
127°F	168.2
128°F	170.8
129°F	173.3
130°F	175.9
131°F	178.5
132°F	181.1
133°F	183.7
134°F	186.4
135°F	189.1
136°F	191.8
137°F	194.6
138°F	197.3
139°F	200.1
140°F	203.0
141°F	205.8
142°F	208.7
143°F	211.6
144°F	214.6
145°F	217.6
146°F	220.6
147°F	223.6
148°F	226.6
149°F	229.7
150°F	232.9

R-152a pressure-temperature saturation table in Celsius and kPa
Temp (°C)	Pressure (kPa)
−40°C	−54
−39°C	−52
−38°C	−49
−37°C	−46
−36°C	−44
−35°C	−41
−34°C	−38
−33°C	−34
−32°C	−31
−31°C	−28
−30°C	−24
−29°C	−20
−28°C	−17
−27°C	−13
−26°C	−9
−25°C	−4
−24°C NBP (atmospheric)	0
−23°C	5
−22°C	9
−21°C	14
−20°C	19
−19°C	25
−18°C	30
−17°C	36
−16°C	41
−15°C	47
−14°C	54
−13°C	60
−12°C	66
−11°C	73
−10°C	80
−9°C	87
−8°C	95
−7°C	102
−6°C	110
−5°C	118
−4°C	127
−3°C	135
−2°C	144
−1°C	153
0°C H₂O freeze	163
1°C	172
2°C	182
3°C	192
4°C	203
5°C	213
6°C	224
7°C	236
8°C	247
9°C	259
10°C	271
11°C	284
12°C	297
13°C	310
14°C	323
15°C	337
16°C	351
17°C	366
18°C	381
19°C	396
20°C	412
21°C	428
22°C	444
23°C	461
24°C	478
25°C	495
26°C	513
27°C	531
28°C	550
29°C	569
30°C	588
31°C	608
32°C	629
33°C	650
34°C	671
35°C	693
36°C	715
37°C	737
38°C	760
39°C	784
40°C	808
41°C	832
42°C	857
43°C	883
44°C	909
45°C	936
46°C	963
47°C	990
48°C	1,018
49°C	1,047
50°C	1,076
51°C	1,106
52°C	1,136
53°C	1,167
54°C	1,198
55°C	1,230
56°C	1,263
57°C	1,296
58°C	1,330
59°C	1,364
60°C	1,399
61°C	1,435
62°C	1,471
63°C	1,508
64°C	1,546
65°C	1,584
66°C	1,623

CoolProp 7.2.0 · PSIG/kPa = gauge · PSIA = PSIG + 14.6959 · kPa(abs) = kPa(gauge) + 101.325

Full saturation values at 1° increments. Toggle between °F / PSIG and °C / kPa. Use Print / Save as PDF for laminated shop reference, or download the CSV / JSON below for use in other tools. R-152a PT chart data: CoolProp 7.2.0 (published Helmholtz equations of state / mixture models — see the source citations above).

Lower toxicity, flammable

Lower toxicity. Flame propagates in air at 60°C with a burning velocity between 10 and 100 cm/s. Less common in HVAC. R-152a and R-365mfc are A2.

Flammability: Yes (10 ≤ burning velocity ≤ 100 cm/s)
Toxicity: Lower

Classification per ANSI/ASHRAE Standard 34-2022^{[1], safety group definitions and refrigerant safety classifications}. See full reference.

Saturation pressure-temperature curve

Pressure

Temperature

Highlight at°F

Quick lookup — R-152a

Temp:°F

62.3PSIG(429 kPa)

Range: −40 to 150°F Open full PT calculator →

Common service temperatures

32°F

24PSIG

Freezing

45°F

35PSIG

Heat-pump heat

70°F

62PSIG

Standard

75°F

69PSIG

Test ref

80°F

76PSIG

Warm

95°F

100PSIG

Summer peak

Saturation values from CoolProp 7.2.0^[2]. Operating pressure on a running system differs — see the operating-pressure references for in-use values.

At a glance

Chemistry

CH3CHF2

1,1-Difluoroethane

Lubricant compatibility

POEMO

Class A2 (flammable, low burning velocity). Used as an aerosol propellant and as a blend component to lower GWP. Some mobile AC research interest as a low-GWP option.

Trade names

Genetron 152a — Honeywell

Common applications

Aerosol propellant (consumer products)
Blend component (R-500 historical, R-516A)
Foam blowing agent

Properties

Boiling point (1 atm)
−11.2°F (−24.0°C)
Critical point
235.9°F (113.3°C) at 641 PSIG
Molar mass
66.05 g/mol
ODP
0
GWP (100-yr)
124 AIM Act exchange value (IPCC AR4) IPCC: AR4 124 · AR5 138 · AR6 164
Atmospheric lifetime
1.5 years
New-equipment status (US)
AIM Act HFC, 84.64 GWP 124 — below every 40 CFR 84.54 limit; no new-equipment restriction.

What is R-152a?

R-152a is 1,1-difluoroethane (CHF₂CH₃) — a pure HFC with A2 safety classification and relatively low GWP (124) for an HFC^[1]^[3]. R-152a's A2 flammability classification (more flammable than A2L, less than A3 hydrocarbons) limits its commercial use as a refrigerant.

R-152a's commercial role is as an aerosol propellant (the "canned air" used for dusting electronics, the propellant in many compressed-air products) and as a foam blowing agent for polyurethane and other foam manufacturing. Refrigeration use is limited — historically R-152a was a component in R-500 (CFC era blend) and is occasionally specified for special low-GWP applications.

Where R-152a is used

Aerosol propellant (compressed-air dusters, specialty propellant applications)
Foam blowing agent for polyurethane and polystyrene foams
Historical component in R-500 (CFC era R-12 / R-152a azeotrope; banned 1996)
Some R-22 retrofit blends in specialty applications
Limited use in mobile AC research and prototype applications

Regulatory & phase-down status

R-152a is a regulated HFC under the AIM Act, but its 40 CFR 84.64 GWP of 124 is below the 150-GWP threshold used by every 84.54 category that carries a limit — including new motor vehicle A/C (84.54(a)(13)) and aerosol products (84.54(a)(16)) — so no 84.54 category restricts it^[3]. See the US new-equipment rules (40 CFR 84.54) section on this page. The constraints on R-152a use are safety-related (A2 flammability) rather than environmental.

EU F-Gas Regulation does not specifically restrict R-152a as a refrigerant.

Service notes

When encountered, A2 flammability procedures apply — A2 is more flammable than A2L, requiring stricter ignition-source controls during service.

POE or mineral oil compatible depending on application.

Operating cycle

Phase-down timeline

R-152a is a regulated substance under the AIM Act. Its GWP under 40 CFR 84.64 is 124 — below every 40 CFR 84.54 GWP limit, so no 84.54 new-equipment limit restricts it.

R-152a is not restricted in new foam blowing agents (its 84.64 GWP 124 is below that subsector's limit).^{[3], §84.54(a)(14), (a)(15)}

R-152a is not restricted in new aerosol propellants / solvents (its 84.64 GWP 124 is below that subsector's limit).^{[3], §84.54(a)(16)}

HFC production & consumption allowances step down to 30% of baseline in 2029–2033, 20% of baseline in 2034–2035, and 15% of baseline in 2036 and later (42 U.S.C. 7675(e)(2)(C)).

Full 40 CFR 84.54 new-equipment rules for R-152a →

US new-equipment rules (40 CFR 84.54)

R-152a is a regulated substance under the AIM Act. Under 40 CFR 84.64(a) its GWP is 124, the AIM Act exchange value. That value is compared against each 40 CFR 84.54 subsector limit below.

Its GWP (124) is under every 40 CFR 84.54 limit for foam blowing agents and for aerosol propellants / solvents, so those restrictions don't apply there.

Not restricted in new foam blowing agents.
Not restricted in new aerosol propellants / solvents.

Servicing. 40 CFR 84.54 restricts new manufacture/import, later sale/distribution, and installation. "Installation" is defined in 84.54(e); repairing or servicing existing R-152a equipment is not an installation unless it meets 84.54(e), so existing systems can keep being serviced. From January 1, 2029, servicing or repairing R-152a equipment in supermarket systems, refrigerated transport or automatic commercial ice makers must be done with reclaimed refrigerant^[5].

Source: 40 CFR 84.54, current through 91 FR 31329 (May 26, 2026). Installation defined at 40 CFR 84.54(e).

Global warming potential, in context

Reading the R-152a PT chart

R-152a's PT chart is a single saturation curve (pure refrigerant). The pressure envelope is moderate — comparable to R-134a — but commercial refrigeration use is limited by A2 flammability.

Frequently asked

›What is R-152a used for?

Primarily aerosol propellant (compressed-air dusters, "canned air" for electronics cleaning) and foam blowing agent for polyurethane manufacturing.

Historically R-152a was a component in R-500 (R-12/R-152a azeotrope, banned 1996 with R-12 under Montreal Protocol). Modern refrigeration use is niche.

›What's R-152a's GWP?

124 — low for an HFC^[3]. The short atmospheric lifetime (~1.4 years) drives the relatively low GWP. R-152a's low GWP is favorable, but the A2 flammability classification limits commercial refrigeration adoption.

›Is R-152a flammable?

Yes — ASHRAE class A2 (flammable, more so than A2L)^[1]. A2 refrigerants have higher burning velocity than A2L and require stricter equipment-design accommodations.

›Why isn't R-152a used more in refrigeration?

A2 flammability classification.

›What's R-152a used for in cans of compressed air?

R-152a is the working substance in many "canned air" or "compressed air duster" products used for cleaning electronics. The product is mostly liquid R-152a; spraying releases vapor that propels dust away from the cleaned surfaces.

›What lubricant does R-152a use?

Application-dependent. Foam blowing and aerosol applications don't use lubricant (R-152a is the active substance, not a refrigerant in a closed compressor system). For the limited refrigeration applications, POE or mineral oil compatibility depends on the specific equipment design.

Download this dataset

Full PT chart for R-152a · CC BY 4.0 · attribute the source

CSV JSON

Sources & citations

[1]
ANSI/ASHRAE Standard 34-2022, Designation and Safety Classification of Refrigerants (free read-only version). ASHRAE. 2022. https://www.ashrae.org/technical-resources/standards-and-guidelines/read-only-versions-of-ashrae-standards (accessed October 2, 2026)
[2]
CoolProp 7.2.0. CoolProp (I. H. Bell, J. Wronski, S. Quoilin, V. Lemort). https://coolprop.org/ (accessed October 2, 2026). Bell, I. H.; Wronski, J.; Quoilin, S.; Lemort, V. Pure and Pseudo-pure Fluid Thermophysical Property Evaluation and the Open-Source Thermophysical Property Library CoolProp. Ind. Eng. Chem. Res. 53, 2498–2508 (2014). https://doi.org/10.1021/ie4033999
[3]
40 CFR 84.54 — Restrictions on the use of hydrofluorocarbons. eCFR (Office of the Federal Register). up to date as of 9/29/2026. https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-84/subpart-B/section-84.54 (accessed October 2, 2026)
[4]
2017 Guideline for Assignment of Refrigerant Container Colors (AHRI Guideline N-2017). AHRI. 2017. https://www.ahrinet.org/system/files/2023-06/AHRI_Guideline_N_2017.pdf (accessed October 2, 2026)
[5]
40 CFR 84.112 — Reclamation. eCFR (Office of the Federal Register). up to date as of 9/25/2026. https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-84/subpart-C/section-84.112 (accessed October 2, 2026). 89 FR 82859, Oct. 11, 2024