Chemours' trade name for R-1336mzz(Z). Chemours is the primary commercial manufacturer.

RefrigerantASHRAE R-1336mzz(Z)

R1336mzz(Z) PT Chart

Q: What's R-1336mzz(Z)'s GWP?

2 — very low. The short atmospheric lifetime drives the low GWP. R-1336mzz(Z) sits in the same low-GWP tier as R-744 (CO₂), R-1234yf, R-1234ze.

Q: Is R-1336mzz(Z) flammable?

No — ASHRAE class A1 (non-toxic, non-flammable). The 4-carbon HFO structure is large enough that combustion in air is not sustained under normal conditions.

Updated October 12, 2026

R-1336mzz(Z)

A1 Lower toxicity, no flame propagationHFO (pure)

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^{[6], section 4.8}. Label: R-1336mzz(Z), safety class A1, GWP 2. No red band: AHRI Guideline N-2017 reserves it for flammable refrigerants^{[6], section 4.7}.

CF3CH=CHCF3 (Z isomer)

Pure HFO (cis-1,1,1,4,4,4-hexafluoro-2-butene) — A1 non-flammable, GWP 2, very low operating pressures. Chemours Opteon MZ (also sold as Opteon SF33 and Opteon 1100). High-temperature heat pump and process refrigeration applications where high condensing temperatures matter.

R-1336mzz(Z) saturation pressure is 20.9 in. Hg vacuum at 40°F, 11.3 in. Hg vacuum at 70°F, and 2.5 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

11.3 in. Hg vac.

GWP (100-yr)

2 US EPA value, 40 CFR 84.64(b)

Boiling point

92.2°F

Sourced facts

ASHRAE safety class: A1^[1]
Chemical formula: CF₃CH=CHCF₃ (Z)^[1]
GWP (100-yr): 2
ODP: 0^[1]
Normal boiling point: 92.2°F (33.5°C)^[3]
Lubricant: POE / PVE / PAG
Trade name: Opteon MZ^[5]

R-1336mzz(Z) PT calculator Superheat

R-1336mzz(Z) PT chart — printable saturation table

Looking for the R-1336mzz(Z) 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-1336mzz(Z) PT Chart — Pressure-Temperature Saturation Table

Computed with CoolProp 8.0.0 in 1°F steps · hvacptcharts.com

R-1336mzz(Z) · 1° increments · °F / PSIG

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

R-1336mzz(Z) pressure-temperature saturation table in Fahrenheit and PSIG
Temp (°F)	Pressure (PSIG)
−40°F	29.2 in. Hg vac.
−39°F	29.2 in. Hg vac.
−38°F	29.2 in. Hg vac.
−37°F	29.1 in. Hg vac.
−36°F	29.1 in. Hg vac.
−35°F	29.1 in. Hg vac.
−34°F	29.0 in. Hg vac.
−33°F	29.0 in. Hg vac.
−32°F	29.0 in. Hg vac.
−31°F	28.9 in. Hg vac.
−30°F	28.9 in. Hg vac.
−29°F	28.9 in. Hg vac.
−28°F	28.8 in. Hg vac.
−27°F	28.8 in. Hg vac.
−26°F	28.7 in. Hg vac.
−25°F	28.7 in. Hg vac.
−24°F	28.7 in. Hg vac.
−23°F	28.6 in. Hg vac.
−22°F	28.6 in. Hg vac.
−21°F	28.5 in. Hg vac.
−20°F	28.5 in. Hg vac.
−19°F	28.4 in. Hg vac.
−18°F	28.3 in. Hg vac.
−17°F	28.3 in. Hg vac.
−16°F	28.2 in. Hg vac.
−15°F	28.2 in. Hg vac.
−14°F	28.1 in. Hg vac.
−13°F	28.1 in. Hg vac.
−12°F	28.0 in. Hg vac.
−11°F	27.9 in. Hg vac.
−10°F	27.9 in. Hg vac.
−9°F	27.8 in. Hg vac.
−8°F	27.7 in. Hg vac.
−7°F	27.6 in. Hg vac.
−6°F	27.6 in. Hg vac.
−5°F	27.5 in. Hg vac.
−4°F	27.4 in. Hg vac.
−3°F	27.3 in. Hg vac.
−2°F	27.2 in. Hg vac.
−1°F	27.1 in. Hg vac.
0°F	27.1 in. Hg vac.
1°F	27.0 in. Hg vac.
2°F	26.9 in. Hg vac.
3°F	26.8 in. Hg vac.
4°F	26.7 in. Hg vac.
5°F	26.6 in. Hg vac.
6°F	26.5 in. Hg vac.
7°F	26.4 in. Hg vac.
8°F	26.2 in. Hg vac.
9°F	26.1 in. Hg vac.
10°F	26.0 in. Hg vac.
11°F	25.9 in. Hg vac.
12°F	25.8 in. Hg vac.
13°F	25.6 in. Hg vac.
14°F	25.5 in. Hg vac.
15°F	25.4 in. Hg vac.
16°F	25.3 in. Hg vac.
17°F	25.1 in. Hg vac.
18°F	25.0 in. Hg vac.
19°F	24.8 in. Hg vac.
20°F	24.7 in. Hg vac.
21°F	24.5 in. Hg vac.
22°F	24.4 in. Hg vac.
23°F	24.2 in. Hg vac.
24°F	24.1 in. Hg vac.
25°F	23.9 in. Hg vac.
26°F	23.7 in. Hg vac.
27°F	23.5 in. Hg vac.
28°F	23.4 in. Hg vac.
29°F	23.2 in. Hg vac.
30°F	23.0 in. Hg vac.
31°F	22.8 in. Hg vac.
32°F H₂O freeze	22.6 in. Hg vac.
33°F	22.4 in. Hg vac.
34°F	22.2 in. Hg vac.
35°F	22.0 in. Hg vac.
36°F	21.8 in. Hg vac.
37°F	21.6 in. Hg vac.
38°F	21.4 in. Hg vac.
39°F	21.1 in. Hg vac.
40°F	20.9 in. Hg vac.
41°F	20.7 in. Hg vac.
42°F	20.4 in. Hg vac.
43°F	20.2 in. Hg vac.
44°F	19.9 in. Hg vac.
45°F	19.7 in. Hg vac.
46°F	19.4 in. Hg vac.
47°F	19.1 in. Hg vac.
48°F	18.9 in. Hg vac.
49°F	18.6 in. Hg vac.
50°F	18.3 in. Hg vac.
51°F	18.0 in. Hg vac.
52°F	17.7 in. Hg vac.
53°F	17.4 in. Hg vac.
54°F	17.1 in. Hg vac.
55°F	16.8 in. Hg vac.
56°F	16.5 in. Hg vac.
57°F	16.1 in. Hg vac.
58°F	15.8 in. Hg vac.
59°F	15.5 in. Hg vac.
60°F	15.1 in. Hg vac.
61°F	14.8 in. Hg vac.
62°F	14.4 in. Hg vac.
63°F	14.1 in. Hg vac.
64°F	13.7 in. Hg vac.
65°F	13.3 in. Hg vac.
66°F	12.9 in. Hg vac.
67°F	12.5 in. Hg vac.
68°F	12.1 in. Hg vac.
69°F	11.7 in. Hg vac.
70°F	11.3 in. Hg vac.
71°F	10.9 in. Hg vac.
72°F	10.5 in. Hg vac.
73°F	10.0 in. Hg vac.
74°F	9.6 in. Hg vac.
75°F	9.1 in. Hg vac.
76°F	8.7 in. Hg vac.
77°F	8.2 in. Hg vac.
78°F	7.7 in. Hg vac.
79°F	7.2 in. Hg vac.
80°F	6.7 in. Hg vac.
81°F	6.2 in. Hg vac.
82°F	5.7 in. Hg vac.
83°F	5.2 in. Hg vac.
84°F	4.7 in. Hg vac.
85°F	4.1 in. Hg vac.
86°F	3.6 in. Hg vac.
87°F	3.0 in. Hg vac.
88°F	2.5 in. Hg vac.
89°F	1.9 in. Hg vac.
90°F	1.3 in. Hg vac.
91°F	0.7 in. Hg vac.
92°F NBP (atmospheric)	0.1 in. Hg vac.
93°F	0.2
94°F	0.5
95°F	0.9
96°F	1.2
97°F	1.5
98°F	1.8
99°F	2.1
100°F	2.5
101°F	2.8
102°F	3.2
103°F	3.5
104°F	3.9
105°F	4.2
106°F	4.6
107°F	5.0
108°F	5.4
109°F	5.7
110°F	6.1
111°F	6.5
112°F	6.9
113°F	7.3
114°F	7.7
115°F	8.2
116°F	8.6
117°F	9.0
118°F	9.5
119°F	9.9
120°F	10.4
121°F	10.8
122°F	11.3
123°F	11.7
124°F	12.2
125°F	12.7
126°F	13.2
127°F	13.7
128°F	14.2
129°F	14.7
130°F	15.2
131°F	15.7
132°F	16.3
133°F	16.8
134°F	17.4
135°F	17.9
136°F	18.5
137°F	19.0
138°F	19.6
139°F	20.2
140°F	20.8
141°F	21.4
142°F	22.0
143°F	22.6
144°F	23.2
145°F	23.9
146°F	24.5
147°F	25.1
148°F	25.8
149°F	26.5
150°F	27.1

R-1336mzz(Z) pressure-temperature saturation table in Celsius and kPa
Temp (°C)	Pressure (kPa)
−40°C	−99
−39°C	−99
−38°C	−99
−37°C	−98
−36°C	−98
−35°C	−98
−34°C	−98
−33°C	−98
−32°C	−97
−31°C	−97
−30°C	−97
−29°C	−96
−28°C	−96
−27°C	−96
−26°C	−95
−25°C	−95
−24°C	−95
−23°C	−94
−22°C	−94
−21°C	−93
−20°C	−93
−19°C	−92
−18°C	−92
−17°C	−91
−16°C	−91
−15°C	−90
−14°C	−89
−13°C	−89
−12°C	−88
−11°C	−87
−10°C	−86
−9°C	−86
−8°C	−85
−7°C	−84
−6°C	−83
−5°C	−82
−4°C	−81
−3°C	−80
−2°C	−79
−1°C	−78
0°C H₂O freeze	−77
1°C	−75
2°C	−74
3°C	−73
4°C	−71
5°C	−70
6°C	−68
7°C	−67
8°C	−65
9°C	−64
10°C	−62
11°C	−60
12°C	−58
13°C	−56
14°C	−54
15°C	−52
16°C	−50
17°C	−48
18°C	−46
19°C	−44
20°C	−41
21°C	−39
22°C	−36
23°C	−33
24°C	−31
25°C	−28
26°C	−25
27°C	−22
28°C	−19
29°C	−15
30°C	−12
31°C	−9
32°C	−5
33°C NBP (atmospheric)	−2
34°C	2
35°C	6
36°C	10
37°C	14
38°C	18
39°C	22
40°C	27
41°C	31
42°C	36
43°C	41
44°C	46
45°C	51
46°C	56
47°C	61
48°C	66
49°C	72
50°C	78
51°C	84
52°C	90
53°C	96
54°C	102
55°C	109
56°C	115
57°C	122
58°C	129
59°C	136
60°C	143
61°C	151
62°C	158
63°C	166
64°C	174
65°C	182
66°C	191

CoolProp 8.0.0 · 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-1336mzz(Z) PT chart data: CoolProp 8.0.0 (published Helmholtz equations of state / mixture models — see the source citations above).

Lower toxicity, no flame propagation

Lower toxicity (Occupational Exposure Limit ≥ 400 ppm). No flame propagation in air at standard atmospheric pressure and 60°C. R-134a, R-22, R-410A, R-404A, R-744 (CO2) are A1.

Flammability: None (no flame propagation)
Toxicity: Lower (OEL ≥ 400 ppm)

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-1336mzz(Z)

Temp:°F

−5.6PSIG(−38 kPa)

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

Common service temperatures

32°F

−11PSIG

Freezing

45°F

−10PSIG

Heat-pump heat

70°F

−6PSIG

Standard

75°F

−4PSIG

Test ref

80°F

−3PSIG

Warm

95°F

1PSIG

Summer peak

Saturation values from CoolProp 8.0.0^[3].

Equation-of-state and mixture-model references

Equation of state: McLinden, M. O.; Akasaka, R. Thermodynamic Properties of cis-1,1,1,4,4,4-Hexafluorobutene [R-1336mzz(Z)]: Vapor Pressure, (p, ρ, T) Behavior, and Speed of Sound Measurements and Equation of State. J. Chem. Eng. Data 65, 4201–4214 (2020). https://doi.org/10.1021/acs.jced.9b01198

At a glance

Chemistry

CF3CH=CHCF3 (Z isomer)

(Z)-1,1,1,4,4,4-Hexafluoro-2-butene

Lubricant compatibility

POEPVEMO

Very low GWP HFO designed for high-temperature heat pumps, organic Rankine cycle, and foam blowing. Higher NBP than R-1234ze(E).

Trade names

Opteon MZ — Chemours
Opteon SF33 — Chemours
Opteon 1100 — Chemours

Common applications

High-temperature heat pumps (industrial)
Organic Rankine cycle working fluid
Foam blowing agent (polyurethane insulation)
Centrifugal chillers (low-pressure)

Properties

Boiling point (1 atm)
92.2°F (33.5°C)
Critical point
340.4°F (171.4°C) at 406 PSIG
Molar mass
164.06 g/mol
ODP
0
GWP (100-yr)
2 US EPA value, 40 CFR 84.64(b) IPCC: AR4 not assessed · AR5 2 · AR6 2.08
Atmospheric lifetime
0.07 years
New-equipment status (US)
Not an AIM Act regulated substance; 40 CFR 84.54 GWP limits don't apply.

What is R-1336mzz(Z)?

R-1336mzz(Z) is a pure HFO (4-carbon hydrofluoroolefin) with a higher boiling point than other HFO refrigerants^[1]. The molecular structure (CF₃CH=CHCF₃, Z isomer) places it in a unique niche for high-temperature heat pump and very-low-pressure refrigeration applications where the high normal boiling point (92°F) and A1 safety class are operational advantages.

R-1336mzz(Z) was developed by Chemours as Opteon 1100, targeting industrial heat pump and high-temperature process refrigeration applications. The high NBP means very low operating pressures even at typical condensing temperatures — chillers and heat pumps using R-1336mzz(Z) often operate at sub-atmospheric pressure on the evaporator side.

Where R-1336mzz(Z) is used

High-temperature industrial heat pumps (process heating applications, up to 150°C delivery temperatures)
Very low-pressure centrifugal chillers
Foam blowing agent in polyurethane insulation
Organic Rankine Cycle (ORC) waste-heat recovery applications

Regulatory & phase-down status

R-1336mzz(Z) faces no phase-down pressure — GWP 2 is below every regulatory threshold.

EPA SNAP has approved R-1336mzz(Z) for industrial heat pump applications^[4].

Service notes

Lubricant choice depends on equipment OEM — POE, PVE, or PAG depending on specific compressor design. Verify against equipment service literature.

Very-low operating pressures mean sub-atmospheric operation on the evaporator side is common. Equipment-OEM service procedures address purge unit operation, vacuum integrity, and the specific service considerations for low-pressure refrigeration systems.

Operating cycle

Phase-down timeline

R-1336mzz(Z) is not an AIM Act regulated substance (not one of the 18 HFCs in 42 U.S.C. 7675(c), and not a blend containing one). The 40 CFR 84.54 GWP limits don't apply.

Global warming potential, in context

Low-pressure centrifugal chillers

Retrofit and replacement paths

R-1336mzz(Z) replaces

Reading the R-1336mzz(Z) PT chart — very low pressures, sub-atmospheric on evaporator

R-1336mzz(Z)'s PT chart shows very low operating pressures across the typical heat pump and refrigeration range. At 70°F R-1336mzz(Z) saturates at −5.6 PSIG (slightly sub-atmospheric); at typical chiller evaporator temperatures (45°F), saturation is well into vacuum. At high-temperature-heat-pump condensing temperatures, saturation stays moderate — 10.4 PSIG at 120°F and 27.1 PSIG at 150°F.

Single saturation curve (pure refrigerant, no glide).

Vacuum operation requires equipment-OEM expertise

Sub-atmospheric operation requires careful equipment design — air ingress through any leak causes refrigerant contamination with non-condensables. R-1336mzz(Z) systems include purge units, vacuum-rated isolation valves, and leak-detection systems specific to vacuum-operation refrigeration. Service technicians need OEM-specific training for these systems.

R-1336mzz(Z) vs R-245fa, R-123: saturation pressure

Saturation pressure (PSIG, gauge) for R-1336mzz(Z) vs R-245fa, R-123. Sources: R-1336mzz(Z): CoolProp 8.0.0 dataset; R-245fa and R-123: CoolProp 7.2.0 dataset.
Temp	R-1336mzz(Z)	R-245fa	R-123
0°F	27.1 in. Hg vac.	23.4 in. Hg vac.	25.9 in. Hg vac.
40°F	20.9 in. Hg vac.	10.7 in. Hg vac.	18.2 in. Hg vac.
70°F	11.3 in. Hg vac.	3.9	6.6 in. Hg vac.
100°F	2.5	19.1	6.1

Frequently asked

›What is R-1336mzz(Z) used for?

High-temperature industrial heat pumps and specialty low-pressure chillers. Chemours markets the refrigerant as Opteon MZ, also sold as Opteon SF33 and Opteon 1100^[5]. The high boiling point (92°F) suits applications where typical refrigerant operating temperatures fall in ranges other refrigerants can't reach efficiently — industrial process heating, ORC waste-heat recovery, high-condensing-temperature heat pumps.

›What's R-1336mzz(Z)'s GWP?

2 — very low^[2]. The short atmospheric lifetime drives the low GWP. R-1336mzz(Z) sits in the same low-GWP tier as R-744 (CO₂), R-1234yf, R-1234ze.

›Why does R-1336mzz(Z) have such high boiling point?

The higher molecular weight (164 g/mol vs R-1234yf's 114) and the specific molecular geometry both contribute to the higher NBP (92°F vs R-1234yf's −21°F).

›Is R-1336mzz(Z) flammable?

No — ASHRAE class A1 (non-toxic, non-flammable)^[1]. The 4-carbon HFO structure is large enough that combustion in air is not sustained under normal conditions.

›What lubricant does R-1336mzz(Z) use?

Equipment-OEM dependent — POE, PVE, or PAG depending on compressor design. Verify against equipment service literature for the specific application.

›What is Opteon 1100?

Chemours' trade name for R-1336mzz(Z)^[5]. Chemours is the primary commercial manufacturer.

›Where will R-1336mzz(Z) grow in the future?

R-1336mzz(Z) enables electric-driven heat pump replacement of natural-gas-fired industrial process heating in applications up to ~150°C delivery temperature.

Download this dataset

Full PT chart for R-1336mzz(Z) · 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]
IPCC AR5 WG1 (2013), Chapter 8, Appendix 8.A, Table 8.A.1. IPCC AR5 Working Group I. 2013. https://www.ipcc.ch/report/ar5/wg1/ (accessed October 2, 2026)
[3]
CoolProp 8.0.0. 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
[4]
EPA SNAP — R-1336mzz(Z) acceptable for high-temperature heat pumps. US EPA (SNAP). https://www.epa.gov/snap (accessed October 2, 2026)
[5]
Chemours Opteon 1100 (R-1336mzz(Z)) Product Data Sheet. Chemours. https://www.chemours.com/en/products/refrigerants (accessed October 2, 2026)
[6]
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)