R507A PT Chart
Updated October 12, 2026
R-507A
Azeotropic blend (ASHRAE 500 series) of 50% R-125 and 50% R-143a by mass[8]: safety class A1[2], GWP 3,985[9], computed glide under 0.1°F at a 40°F dew point[5]. Trade names include Forane® 507A (Arkema)[10] and Genetron® AZ-50 (Honeywell)[11]; Chemours ended US sales of Freon™ 507 on May 2, 2024[12]. Under SNAP, EPA lists it as unacceptable in new supermarket systems from January 1, 2017, in supermarket retrofits from July 20, 2016[13], and in new cold storage warehouses from January 1, 2023[14].
R-507A saturation pressure is 89.2 PSIG at 40°F, 153.0 PSIG at 70°F, and 242.3 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.
Checked against the Saturation Pressure-Temperature Data for R-507A (psig)[1] at 382 points from −40°F to 150°F: largest difference 0.05 psi. The chart states it was generated with NIST REFPROP 9.0.
R-507A PT chart — printable saturation table
Looking for the R-507A 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-507A PT Chart — Pressure-Temperature Saturation Table
Computed with CoolProp 7.2.0 in 1°F steps · hvacptcharts.com
| Temp (°F) | Pressure (PSIG) |
|---|---|
| −40°F | 5.4 |
| −39°F | 5.9 |
| −38°F | 6.4 |
| −37°F | 7.0 |
| −36°F | 7.5 |
| −35°F | 8.1 |
| −34°F | 8.6 |
| −33°F | 9.2 |
| −32°F | 9.8 |
| −31°F | 10.4 |
| −30°F | 11.0 |
| −29°F | 11.6 |
| −28°F | 12.2 |
| −27°F | 12.8 |
| −26°F | 13.5 |
| −25°F | 14.1 |
| −24°F | 14.8 |
| −23°F | 15.5 |
| −22°F | 16.2 |
| −21°F | 16.9 |
| −20°F | 17.6 |
| −19°F | 18.3 |
| −18°F | 19.1 |
| −17°F | 19.8 |
| −16°F | 20.6 |
| −15°F | 21.4 |
| −14°F | 22.2 |
| −13°F | 23.0 |
| −12°F | 23.8 |
| −11°F | 24.7 |
| −10°F | 25.5 |
| −9°F | 26.4 |
| −8°F | 27.3 |
| −7°F | 28.2 |
| −6°F | 29.1 |
| −5°F | 30.0 |
| −4°F | 30.9 |
| −3°F | 31.9 |
| −2°F | 32.8 |
| −1°F | 33.8 |
| 0°F | 34.8 |
| 1°F | 35.8 |
| 2°F | 36.9 |
| 3°F | 37.9 |
| 4°F | 39.0 |
| 5°F | 40.1 |
| 6°F | 41.1 |
| 7°F | 42.3 |
| 8°F | 43.4 |
| 9°F | 44.5 |
| 10°F | 45.7 |
| 11°F | 46.9 |
| 12°F | 48.1 |
| 13°F | 49.3 |
| 14°F | 50.5 |
| 15°F | 51.8 |
| 16°F | 53.0 |
| 17°F | 54.3 |
| 18°F | 55.6 |
| 19°F | 56.9 |
| 20°F | 58.3 |
| 21°F | 59.6 |
| 22°F | 61.0 |
| 23°F | 62.4 |
| 24°F | 63.8 |
| 25°F | 65.3 |
| 26°F | 66.7 |
| 27°F | 68.2 |
| 28°F | 69.7 |
| 29°F | 71.2 |
| 30°F | 72.7 |
| 31°F | 74.3 |
| 32°F H₂O freeze | 75.9 |
| 33°F | 77.5 |
| 34°F | 79.1 |
| 35°F | 80.7 |
| 36°F | 82.4 |
| 37°F | 84.1 |
| 38°F | 85.8 |
| 39°F | 87.5 |
| 40°F | 89.2 |
| 41°F | 91.0 |
| 42°F | 92.8 |
| 43°F | 94.6 |
| 44°F | 96.5 |
| 45°F | 98.3 |
| 46°F | 100.2 |
| 47°F | 102.1 |
| 48°F | 104.1 |
| 49°F | 106.0 |
| 50°F | 108.0 |
| 51°F | 110.0 |
| 52°F | 112.0 |
| 53°F | 114.1 |
| 54°F | 116.2 |
| 55°F | 118.3 |
| 56°F | 120.4 |
| 57°F | 122.6 |
| 58°F | 124.7 |
| 59°F | 127.0 |
| 60°F | 129.2 |
| 61°F | 131.4 |
| 62°F | 133.7 |
| 63°F | 136.0 |
| 64°F | 138.4 |
| 65°F | 140.7 |
| 66°F | 143.1 |
| 67°F | 145.6 |
| 68°F | 148.0 |
| 69°F | 150.5 |
| 70°F | 153.0 |
| 71°F | 155.5 |
| 72°F | 158.1 |
| 73°F | 160.7 |
| 74°F | 163.3 |
| 75°F | 165.9 |
| 76°F | 168.6 |
| 77°F | 171.3 |
| 78°F | 174.1 |
| 79°F | 176.8 |
| 80°F | 179.6 |
| 81°F | 182.5 |
| 82°F | 185.3 |
| 83°F | 188.2 |
| 84°F | 191.1 |
| 85°F | 194.1 |
| 86°F | 197.1 |
| 87°F | 200.1 |
| 88°F | 203.1 |
| 89°F | 206.2 |
| 90°F | 209.3 |
| 91°F | 212.5 |
| 92°F | 215.6 |
| 93°F | 218.9 |
| 94°F | 222.1 |
| 95°F | 225.4 |
| 96°F | 228.7 |
| 97°F | 232.0 |
| 98°F | 235.4 |
| 99°F | 238.8 |
| 100°F | 242.3 |
| 101°F | 245.8 |
| 102°F | 249.3 |
| 103°F | 252.9 |
| 104°F | 256.5 |
| 105°F | 260.1 |
| 106°F | 263.8 |
| 107°F | 267.5 |
| 108°F | 271.2 |
| 109°F | 275.0 |
| 110°F | 278.8 |
| 111°F | 282.7 |
| 112°F | 286.6 |
| 113°F | 290.5 |
| 114°F | 294.5 |
| 115°F | 298.5 |
| 116°F | 302.6 |
| 117°F | 306.7 |
| 118°F | 310.8 |
| 119°F | 315.0 |
| 120°F | 319.2 |
| 121°F | 323.5 |
| 122°F | 327.8 |
| 123°F | 332.1 |
| 124°F | 336.5 |
| 125°F | 340.9 |
| 126°F | 345.4 |
| 127°F | 349.9 |
| 128°F | 354.5 |
| 129°F | 359.1 |
| 130°F | 363.8 |
| 131°F | 368.5 |
| 132°F | 373.2 |
| 133°F | 378.0 |
| 134°F | 382.9 |
| 135°F | 387.8 |
| 136°F | 392.7 |
| 137°F | 397.7 |
| 138°F | 402.7 |
| 139°F | 407.8 |
| 140°F | 413.0 |
| 141°F | 418.2 |
| 142°F | 423.4 |
| 143°F | 428.7 |
| 144°F | 434.1 |
| 145°F | 439.5 |
| 146°F | 444.9 |
| 147°F | 450.5 |
| 148°F | 456.1 |
| 149°F | 461.7 |
| 150°F | 467.4 |
| Temp (°C) | Pressure (kPa) |
|---|---|
| −40°C | 37 |
| −39°C | 44 |
| −38°C | 50 |
| −37°C | 57 |
| −36°C | 64 |
| −35°C | 71 |
| −34°C | 79 |
| −33°C | 87 |
| −32°C | 95 |
| −31°C | 103 |
| −30°C | 112 |
| −29°C | 120 |
| −28°C | 130 |
| −27°C | 139 |
| −26°C | 149 |
| −25°C | 159 |
| −24°C | 169 |
| −23°C | 179 |
| −22°C | 190 |
| −21°C | 202 |
| −20°C | 213 |
| −19°C | 225 |
| −18°C | 237 |
| −17°C | 250 |
| −16°C | 263 |
| −15°C | 276 |
| −14°C | 290 |
| −13°C | 304 |
| −12°C | 318 |
| −11°C | 333 |
| −10°C | 348 |
| −9°C | 364 |
| −8°C | 380 |
| −7°C | 396 |
| −6°C | 413 |
| −5°C | 430 |
| −4°C | 448 |
| −3°C | 466 |
| −2°C | 485 |
| −1°C | 504 |
| 0°C H₂O freeze | 523 |
| 1°C | 543 |
| 2°C | 563 |
| 3°C | 584 |
| 4°C | 606 |
| 5°C | 628 |
| 6°C | 650 |
| 7°C | 673 |
| 8°C | 696 |
| 9°C | 720 |
| 10°C | 745 |
| 11°C | 770 |
| 12°C | 795 |
| 13°C | 821 |
| 14°C | 848 |
| 15°C | 875 |
| 16°C | 903 |
| 17°C | 932 |
| 18°C | 961 |
| 19°C | 990 |
| 20°C | 1,020 |
| 21°C | 1,051 |
| 22°C | 1,083 |
| 23°C | 1,115 |
| 24°C | 1,148 |
| 25°C | 1,181 |
| 26°C | 1,215 |
| 27°C | 1,250 |
| 28°C | 1,286 |
| 29°C | 1,322 |
| 30°C | 1,359 |
| 31°C | 1,396 |
| 32°C | 1,435 |
| 33°C | 1,474 |
| 34°C | 1,513 |
| 35°C | 1,554 |
| 36°C | 1,595 |
| 37°C | 1,637 |
| 38°C | 1,680 |
| 39°C | 1,724 |
| 40°C | 1,768 |
| 41°C | 1,814 |
| 42°C | 1,860 |
| 43°C | 1,907 |
| 44°C | 1,954 |
| 45°C | 2,003 |
| 46°C | 2,053 |
| 47°C | 2,103 |
| 48°C | 2,154 |
| 49°C | 2,207 |
| 50°C | 2,260 |
| 51°C | 2,314 |
| 52°C | 2,369 |
| 53°C | 2,425 |
| 54°C | 2,482 |
| 55°C | 2,541 |
| 56°C | 2,600 |
| 57°C | 2,660 |
| 58°C | 2,721 |
| 59°C | 2,784 |
| 60°C | 2,847 |
| 61°C | 2,912 |
| 62°C | 2,978 |
| 63°C | 3,045 |
| 64°C | 3,114 |
| 65°C | 3,183 |
| 66°C | 3,255 |
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-507A PT chart data: CoolProp 7.2.0 (published Helmholtz equations of state / mixture models — see the source citations above).
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[2], safety group definitions and refrigerant safety classifications. See full reference.
Saturation pressure-temperature curve
Saturation values from CoolProp 7.2.0 mixture model: R-125/R-143a, 50/50% by mass[5]. Operating pressure on a running system differs — see the operating-pressure references for in-use values.
At a glance
Chemistry
Lubricant compatibility
Blend composition
- R-125 50.0%
- R-143a 50.0%
Trade names
Common applications
- Medium- and low-temperature refrigeration[10]
Properties
- Boiling point (1 atm)bubble −52.1°F (−46.7°C), dew −52.1°F (−46.7°C)
- Critical pointNo single point — blend critical locus
- Molar mass98.86 g/mol
- Temperature glideunder 0.1°F
- ODP0
- GWP (100-yr)3,985 US EPA value, 40 CFR 84.64(b) IPCC: AR4 3,985 · AR5 3,985 · AR6 4,775
- New-equipment status (US)Restricted in 48 new-equipment categories — US new-equipment rules (40 CFR 84.54).
What is R-507A?
R-507A is an azeotropic binary blend of 50% R-125 and 50% R-143a by mass[2].[2], refrigerant designations Its computed glide is under 0.1°F at a 40°F dew point[5], so the table shows one column. Copeland lists R-507 as an R-502 replacement[15], R-507 row, and Arkema notes that its properties closely match R-502's[10].
Its GWP on the US EPA basis is 3,985, slightly above R-404A's 3,922[3].[9]
Regulatory & phase-down status
Under the AIM Act, R-507A (40 CFR 84.64 GWP 3,985, above every 84.54 limit) is restricted for new equipment subsector by subsector at 40 CFR 84.54 — for example, new ice makers from January 1, 2026 (84.54(a)(8)(i)) and new supermarket systems from January 1, 2027 (84.54(c)(12)(i)).[3], §84.54(a)(8)(i), (c)(12)(i) See the "US new-equipment rules (40 CFR 84.54)" section on this page for the full mapped table[3]. Under Regulation (EU) No 517/2014, since replaced by (EU) 2024/573, applying from March 11, 2024, Annex III row 12 restricts new stationary refrigeration equipment with GWP ≥2,500 from 2020, except equipment designed to cool products below −50°C[4].[4], Annex III row 12
Servicing existing R-507A equipment is not an installation under 84.54(e)[3], §84.54(e). Chemours publishes guidelines for retrofitting R-507 systems to Opteon™ XP40 (R-449A)[16], and Solstice Advanced Materials lists R-507 among the refrigerants Solstice® N40 (R-448A) replaces[17]; both are A1[2], with GWPs of 1,396 and 1,386[9].
Service notes
Copeland lists POE oil for R-507[15], R-507 row.
A1 classification means no A2L procedures required.
Operating cycle
Phase-down timeline
R-507A contains HFC-125 and HFC-143a, regulated substances under the AIM Act[19], 42 U.S.C. 7675(c)(1). Its GWP under 40 CFR 84.64 is 3,985, at or above the limit in 48 of the categories 40 CFR 84.54 restricts (listed under “All 84.54 categories restricting R-507A”).
- From January 1, 2025 — new retail food refrigeration — stand-alone units: manufacture / import restricted (GWP ≥ 150)[3], §84.54(a)(4).
- From January 1, 2025 — new refrigerated transport — road and marine (self-contained products): manufacture / import restricted (listed refrigerant)[3], §84.54(a)(7).
- From January 1, 2025 — new refrigerated transport — road or marine systems: installation restricted (listed refrigerant)[3], §84.54(c)(8).
- From January 1, 2026 — new ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h: manufacture / import restricted (GWP ≥ 150)[3], §84.54(a)(8)(i).
- From July 27, 2026 — new refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher: manufacture / import restricted (GWP ≥ 700)[3], §84.54(a)(6).
- From July 27, 2026 — new retail food refrigeration — remote condensing units: installation restricted (GWP ≥ 1,400)[3], §84.54(c)(11)(i).
- From July 27, 2026 — new refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher: installation restricted (GWP ≥ 700)[3], §84.54(c)(7).
- From July 27, 2026 — new cold storage warehouse systems: installation restricted (GWP ≥ 700)[3], §84.54(c)(9)(i).
- From January 1, 2027 — new ice makers — batch type above 1,000 lb of ice per 24 h and continuous type above 1,200 lb per 24 h: manufacture / import restricted (listed refrigerant)[3], §84.54(a)(8)(ii).
- From January 1, 2027 — new supermarket systems: installation restricted (GWP ≥ 1,400)[3], §84.54(c)(12)(i).
- From January 1, 2027 — new automatic commercial ice machines with a remote condenser: installation restricted (listed refrigerant)[3], §84.54(c)(14).
- From January 1, 2028 — new retail food refrigeration — stand-alone units: sale and distribution restricted (GWP ≥ 150)[3], §84.54(b).
- From January 1, 2032 — new retail food refrigeration — remote condensing units: installation restricted at GWP ≥ 150 for systems with 200 lb or more of refrigerant (except the high-temperature side of a cascade system), and at GWP ≥ 300 for systems under 200 lb and for the high-temperature side of a cascade system[3], §84.54(c)(11)(ii).
- From January 1, 2032 — new supermarket systems: installation restricted at GWP ≥ 150 for systems with 200 lb or more of refrigerant (except the high-temperature side of a cascade system), and at GWP ≥ 300 for systems under 200 lb and for the high-temperature side of a cascade system[3], §84.54(c)(12)(ii).
- From January 1, 2032 — new cold storage warehouse systems: installation restricted at GWP ≥ 150 for systems with 200 lb or more of refrigerant (except the high-temperature side of a cascade system), and at GWP ≥ 300 for systems under 200 lb and for the high-temperature side of a cascade system[3], §84.54(c)(9)(ii).
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))[19].
US new-equipment rules (40 CFR 84.54)
R-507A contains HFC-125 and HFC-143a, regulated substances under the AIM Act[19], 42 U.S.C. 7675(c)(1). Under 40 CFR 84.64(b) its GWP is 3,985: each component's GWP times its mass fraction; components without a GWP under 84.64 are left out (84.64(c)). That value is compared against each 40 CFR 84.54 subsector limit below.
| Effective | Equipment subsector | Limit | Restriction | ¶ |
|---|---|---|---|---|
| January 1, 2025 | Retail food refrigeration — stand-alone units | GWP ≥ 150 | Manufacture / import | (a)(4) |
| January 1, 2025 | Refrigerated transport — road and marine (self-contained products) | listed refrigerant | Manufacture / import | (a)(7) |
| January 1, 2025 | Refrigerated transport — road or marine systems | listed refrigerant | Installation | (c)(8) |
| January 1, 2026 | Ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h | GWP ≥ 150 | Manufacture / import | (a)(8)(i) |
| July 27, 2026 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | Manufacture / import | (a)(6) |
| July 27, 2026 | Retail food refrigeration — remote condensing units | GWP ≥ 1,400 | Installation | (c)(11)(i) |
| July 27, 2026 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | Installation | (c)(7) |
| July 27, 2026 | Cold storage warehouse systems | GWP ≥ 700 | Installation | (c)(9)(i) |
| January 1, 2027 | Ice makers — batch type above 1,000 lb of ice per 24 h and continuous type above 1,200 lb per 24 h | listed refrigerant | Manufacture / import | (a)(8)(ii) |
| January 1, 2027 | Supermarket systems | GWP ≥ 1,400 | Installation | (c)(12)(i) |
| January 1, 2027 | Automatic commercial ice machines with a remote condenser | listed refrigerant | Installation | (c)(14) |
| January 1, 2028 | Retail food refrigeration — stand-alone units | GWP ≥ 150 | Sale / distribution | (b) |
| January 1, 2028 | Refrigerated transport — road and marine (self-contained products) | listed refrigerant | Sale / distribution | (b) |
| January 1, 2029 | Ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h | GWP ≥ 150 | Sale / distribution | (b) |
| July 27, 2029 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | Sale / distribution | (b) |
| January 1, 2030 | Ice makers — batch type above 1,000 lb of ice per 24 h and continuous type above 1,200 lb per 24 h | listed refrigerant | Sale / distribution | (b) |
| January 1, 2032 | Retail food refrigeration — remote condensing units | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | Installation | (c)(11)(ii) |
| January 1, 2032 | Supermarket systems | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | Installation | (c)(12)(ii) |
| January 1, 2032 | Cold storage warehouse systems | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | Installation | (c)(9)(ii) |
All 84.54 categories restricting R-507A (48)[3]
| Refrigeration, air conditioning & heat pumps (41) | |||
| January 1, 2025 | Self-contained residential & light-commercial AC and heat pump products | GWP ≥ 700 | (a)(1) |
| January 1, 2025 | Chillers for comfort cooling | GWP ≥ 700 | (a)(10)(i) |
| January 1, 2025 | Chillers for ice rinks | GWP ≥ 700 | (a)(10)(ii) |
| January 1, 2025 | Residential dehumidifiers | GWP ≥ 700 | (a)(2) |
| January 1, 2025 | Household refrigerators and freezers | GWP ≥ 150 | (a)(3) |
| January 1, 2025 | Retail food refrigeration — stand-alone units | GWP ≥ 150 | (a)(4) |
| January 1, 2025 | Vending machines | GWP ≥ 150 | (a)(5) |
| January 1, 2025 | Refrigerated transport — road and marine (self-contained products) | listed refrigerant | (a)(7) |
| January 1, 2025 | Residential & light-commercial AC and heat pump systems (except VRF) | GWP ≥ 700 | (c)(1) |
| January 1, 2025 | Chillers for comfort cooling | GWP ≥ 700 | (c)(3) |
| January 1, 2025 | Ice rinks | GWP ≥ 700 | (c)(4) |
| January 1, 2025 | Refrigerated transport — road or marine systems | listed refrigerant | (c)(8) |
| January 1, 2026 | Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C) | GWP ≥ 700 | (a)(10)(iii) |
| January 1, 2026 | Industrial process refrigeration products (non-chiller), charge 200 lb or greater, refrigerant entering the evaporator warmer than −22°F (−30°C) | GWP ≥ 150 | (a)(12)(i) |
| January 1, 2026 | Industrial process refrigeration products (non-chiller), charge less than 200 lb, refrigerant entering the evaporator warmer than −22°F (−30°C) | GWP ≥ 300 | (a)(12)(ii) |
| January 1, 2026 | Ice makers — batch type up to 1,000 lb of ice per 24 h and continuous type up to 1,200 lb per 24 h | GWP ≥ 150 | (a)(8)(i) |
| January 1, 2026 | Industrial process refrigeration systems (non-chiller), charge 200 lb or greater, evaporator inlet warmer than −22°F (−30°C), not the high-temperature side of a cascade | GWP ≥ 150 | (c)(10)(i) |
| January 1, 2026 | Industrial process refrigeration systems (non-chiller), charge less than 200 lb, evaporator inlet warmer than −22°F (−30°C) | GWP ≥ 300 | (c)(10)(ii) |
| January 1, 2026 | Industrial process refrigeration — high-temperature side of cascade systems, evaporator inlet warmer than −22°F (−30°C) | GWP ≥ 300 | (c)(10)(iii) |
| January 1, 2026 | Variable refrigerant flow (VRF) residential & light-commercial AC and heat pump systems | GWP ≥ 700 | (c)(2) |
| January 1, 2026 | Chillers for industrial process refrigeration, fluid exiting the chiller warmer than −22°F (−30°C) | GWP ≥ 700 | (c)(5)(i) |
| July 27, 2026 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | (a)(6) |
| July 27, 2026 | Retail food refrigeration — remote condensing units | GWP ≥ 1,400 | (c)(11)(i) |
| July 27, 2026 | Refrigerated transport — intermodal containers with a box temperature of −31°F (−35°C) or higher | GWP ≥ 700 | (c)(7) |
| July 27, 2026 | Cold storage warehouse systems | GWP ≥ 700 | (c)(9)(i) |
| January 1, 2027 | Self-contained products in data center, information technology equipment facility, and computer room cooling | GWP ≥ 700 | (a)(11) |
| January 1, 2027 | Ice makers — batch type above 1,000 lb of ice per 24 h and continuous type above 1,200 lb per 24 h | listed refrigerant | (a)(8)(ii) |
| January 1, 2027 | Refrigerated food processing and dispensing products outside the scope of UL 621, charge 500 g or less | GWP ≥ 150 | (a)(9)(i) |
| January 1, 2027 | Refrigerated food processing and dispensing products outside the scope of UL 621, charge greater than 500 g | listed refrigerant | (a)(9)(ii) |
| January 1, 2027 | Supermarket systems | GWP ≥ 1,400 | (c)(12)(i) |
| January 1, 2027 | Data center, information technology equipment facility, and computer room cooling systems | GWP ≥ 700 | (c)(13) |
| January 1, 2027 | Automatic commercial ice machines with a remote condenser | listed refrigerant | (c)(14) |
| January 1, 2027 | Refrigerated food processing and dispensing equipment with a remote condenser | listed refrigerant | (c)(15) |
| January 1, 2028 | Chillers for industrial process refrigeration, fluid exiting the chiller from −58°F to −22°F (−50°C to −30°C) | GWP ≥ 700 | (a)(10)(iv) |
| January 1, 2028 | Industrial process refrigeration products (non-chiller), refrigerant entering the evaporator from −58°F to −22°F (−50°C to −30°C) | GWP ≥ 700 | (a)(12)(iii) |
| January 1, 2028 | Refrigerated food processing and dispensing products within the scope of UL 621 (ice cream makers) | listed refrigerant | (a)(9)(iii) |
| January 1, 2028 | Industrial process refrigeration systems (non-chiller), evaporator inlet from −58°F to −22°F (−50°C to −30°C) | GWP ≥ 700 | (c)(10)(iv) |
| January 1, 2028 | Chillers for industrial process refrigeration, fluid exiting the chiller from −58°F to −22°F (−50°C to −30°C) | GWP ≥ 700 | (c)(6)(i) |
| January 1, 2032 | Retail food refrigeration — remote condensing units | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | (c)(11)(ii) |
| January 1, 2032 | Supermarket systems | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | (c)(12)(ii) |
| January 1, 2032 | Cold storage warehouse systems | GWP ≥ 150 (200 lb or greater, not the cascade high side); GWP ≥ 300 (less than 200 lb); GWP ≥ 300 (cascade high side) | (c)(9)(ii) |
| Motor vehicle air conditioning (3) | |||
| October 24, 2024 | Motor vehicle air-conditioning in Model Year 2025 and later light-duty passenger cars and trucks (gross vehicle weight rating under 8,500 lb) | GWP ≥ 150 | (a)(13)(i) |
| Model Year 2028 | Motor vehicle air-conditioning in medium-duty passenger vehicles, heavy-duty pickup trucks and complete heavy-duty vans whose air-conditioning will not be modified by upfitters | GWP ≥ 150 | (a)(13)(ii) |
| January 1, 2028 | Motor vehicle air-conditioning in certain nonroad vehicles (agricultural tractors over 40 horsepower; self-propelled agricultural machinery; compact equipment; construction, forestry and mining equipment; and commercial utility vehicles) | GWP ≥ 150 | (a)(13)(iii) |
| Foam blowing agents (2) | |||
| January 1, 2025 | Foam products: rigid polyurethane appliance foam, commercial refrigeration foam, laminated boardstock, marine flotation foam, sandwich panels, slabstock; flexible polyurethane; integral skin polyurethane; polystyrene (extruded boardstock, billet, extruded sheet); phenolic insulation board and bunstock; polyisocyanurate laminated boardstock; polyolefin; rigid polyurethane spray foam | GWP ≥ 150 | (a)(14) |
| January 1, 2026 | Foam products in the (a)(14) formulations for use in space and military applications | GWP ≥ 150 | (a)(15) |
| Aerosol propellants / solvents (2) | |||
| January 1, 2025 | Aerosol products | GWP ≥ 150 | (a)(16)(i) |
| January 1, 2028 | Aerosol products (all, except defense sprays as defined in 84.3) | GWP ≥ 150 | (a)(16)(ii) |
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-507A 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-507A equipment in supermarket systems, refrigerated transport or automatic commercial ice makers must be done with reclaimed refrigerant[7].
EU (retail-food / cold-storage)
Under Regulation (EU) No 517/2014, since replaced by (EU) 2024/573, applying from March 11, 2024 (compared against the AR4 headline GWP), R-507A's GWP is at or above the limit in:
- Art. 13(3): from January 1, 2020, F-gases with GWP ≥ 2,500 may not be used to service or maintain refrigeration equipment with a charge of 40 t CO₂e or more — except military equipment, equipment cooling products below −50 °C, and, until January 1, 2030, reclaimed or recycled gas.
- Annex III row 11: Refrigerators and freezers for commercial use (hermetically sealed equipment) — GWP ≥ 2,500, from January 1, 2020.
- Annex III row 12: Stationary refrigeration equipment — GWP ≥ 2,500, from January 1, 2020 (except equipment designed to cool products below −50°C).
- Annex III row 11: Refrigerators and freezers for commercial use (hermetically sealed equipment) — GWP ≥ 150, from January 1, 2022.
- Annex III row 13: Multipack centralised refrigeration systems for commercial use with a rated capacity of 40 kW or more — GWP ≥ 150, from January 1, 2022 (the primary refrigerant circuit of a cascade system may use GWP below 1,500).
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
Commercial refrigeration — low temperature
Retrofit and replacement paths
R-507A replaces
Reading the R-507A PT chart — true azeotrope, single curve
R-507A is an azeotrope: its computed glide is under 0.1°F at a 40°F dew point[5]. The table shows one column, the bubble pressure, as for a pure refrigerant.
For service measurement: superheat = suction line temp − saturation temp at suction pressure; subcooling = saturation temp at discharge pressure − liquid line temp.
R-507A vs R-502, R-449A, R-454C, R-455A: saturation pressure
| Temp | R-507A | R-502 | R-449A | R-454C | R-455A |
|---|---|---|---|---|---|
| 0°F | 34.8 | 29.8(−14%) | 24.2 / 33.4(−4%) | 19.9 / 31.8(−9%) | 22.3 / 44.1(+27%) |
| 40°F | 89.2 | 77.9(−13%) | 71.6 / 87.4(−2%) | 61.5 / 82.4(−8%) | 66.9 / 103.3(+16%) |
| 70°F | 153.0 | 133.9(−12%) | 129.4 / 151.0(−1%) | 112.2 / 141.2(−8%) | 121.1 / 170.1(+11%) |
| 100°F | 242.3 | 211.8(−13%) | 212.7 / 240.0(−1%) | 185.1 / 222.5(−8%) | 199.6 / 260.7(+8%) |
Frequently asked
›What is the normal operating pressure of R-507A?
Operating pressure depends on evaporator load and ambient. The saturation pressures are in the PT table and the comparison table on this page.
›What's the difference between R-507A and R-404A?
›Why does R-507A have such high GWP?
›Is R-507A still legal?
Servicing existing R-507A equipment is not an installation under 40 CFR 84.54(e)[3], §84.54(e); from January 1, 2029, service in supermarket systems, refrigerated transport and automatic commercial ice makers must use reclaimed refrigerant[7], §84.112(e). New equipment is restricted subsector by subsector under the AIM Act at 40 CFR 84.54 — for example, new supermarket systems from January 1, 2027 (84.54(c)(12)(i)).[3], §84.54(c)(12)(i) See the "US new-equipment rules (40 CFR 84.54)" section on this page for each subsector, date, and paragraph.
AIM Act production and consumption allowances step down to 30% of baseline in 2029–2033, 20% in 2034–2035 and 15% in 2036 and later[19], 42 U.S.C. 7675(e)(2)(C).
›What lubricant does R-507A use?
Polyol ester (POE) oil[15], R-507 row.
›Does R-507A have temperature glide?
›Can I retrofit R-507A to a lower-GWP refrigerant?
Sources & citations
- [1]Arkema Forane® 507A pressure-temperature chart. Arkema. https://www.arkema.com/files/live/sites/shared_arkema/files/downloads/products/fluorochemicals/Forane-507A-Pressure-temperature-chart.pdf (accessed October 5, 2026)
- [2]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)
- [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]Regulation (EU) No 517/2014 on fluorinated greenhouse gases. EUR-Lex. OJ L 150, 20.5.2014 (replaced by (EU) 2024/573 from March 11, 2024). https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32014R0517 (accessed October 2, 2026)
- [5]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
- [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)
- [7]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
- [8]ASHRAE Refrigerant Designations. ASHRAE. web page, updated May 25, 2021. https://www.ashrae.org/technical-resources/standards-and-guidelines/ashrae-refrigerant-designations (accessed October 2, 2026)
- [9]Technology Transitions GWP Reference Table. US EPA. updated April 2, 2026. https://www.epa.gov/hfcs/technology-transitions-gwp-reference-table (accessed October 2, 2026)
- [10]Forane® 507A (R-507A). Arkema. product page. https://www.arkema.com/usa/en/product/fluorochemicals/forane507a/ (accessed October 5, 2026)
- [11]Genetron® AZ-50 (R-507A). Honeywell Refrigerants (Europe). product page. https://www.honeywell-refrigerants.com/europe/product/genetron-az-50/ (accessed October 5, 2026)
- [12]Chemours Discontinues U.S. Sales of Legacy Freon™ Refrigerants 404A and 507. The Chemours Company (press release via Business Wire). May 2, 2024. https://www.businesswire.com/news/home/20240502858082/en (accessed October 5, 2026)
- [13]Substitutes in Typical Supermarket Systems. US EPA (SNAP). last updated March 20, 2026. https://www.epa.gov/snap/substitutes-typical-supermarket-systems (accessed October 5, 2026)
- [14]Substitutes in Cold Storage Warehouses. US EPA (SNAP). last updated March 19, 2026. https://www.epa.gov/snap/substitutes-cold-storage-warehouses (accessed October 5, 2026)
- [15]Refrigerants and lubricants approved for use in Copeland compressors. Copeland. Form 93-11 R41 (5/24). https://webapps.copeland.com/online-product-information/Publication/LaunchPDF?Index=AEB&PDF=93-11 (accessed October 2, 2026)
- [16]Opteon™ XP40 Retrofit Guidelines to Replace R-404A/R-507. Chemours. C-10023 (1/16). https://www.opteon.com/en/-/media/files/opteon/opteon-xp40-retrofit-guidelines-r-404a-r-507.pdf (accessed October 5, 2026)
- [17]Solstice® N40 (R-448A). Solstice Advanced Materials. product page. https://www.solstice.com/us/en/products/air-conditioning-refrigeration-and-heating/solstice-hfo-blends/solstice-n40-r-448a (accessed October 5, 2026)
- [18]40 CFR 84.64 — Global warming potentials. eCFR (Office of the Federal Register). current as of 9/28/2026. https://www.ecfr.gov/current/title-40/chapter-I/subchapter-C/part-84/subpart-B/section-84.64 (accessed October 2, 2026)
- [19]42 U.S.C. 7675 — American Innovation and Manufacturing Act. US Code (via Cornell LII). current. https://www.law.cornell.edu/uscode/text/42/7675 (accessed October 2, 2026)