{
  "slug": "r-448a",
  "displayName": "R-448A",
  "altSpellings": [
    "R448A",
    "448A",
    "Solstice N40"
  ],
  "chemicalName": "Five-component HFC/HFO blend",
  "chemicalFormula": "R-32/R-125/R-1234yf/R-134a/R-1234ze (26/26/20/21/7)",
  "ashraeNumber": "R-448A",
  "type": "hfc-blend",
  "safetyClass": "A1",
  "tradeNames": [
    {
      "name": "Solstice N40",
      "manufacturer": "Honeywell"
    }
  ],
  "composition": [
    {
      "component": "R-32",
      "massFraction": 0.26
    },
    {
      "component": "R-125",
      "massFraction": 0.26
    },
    {
      "component": "R-1234yf",
      "massFraction": 0.2
    },
    {
      "component": "R-134a",
      "massFraction": 0.21
    },
    {
      "component": "R-1234ze(E)",
      "massFraction": 0.07
    }
  ],
  "physical": {
    "boilingPointC": -45.9,
    "boilingPointF": -50.6,
    "critical": {
      "tempC": 82.7,
      "tempF": 180.9,
      "pressurePsia": 668.5,
      "pressurePsig": 653.8,
      "pressureKpaA": 4609,
      "pressureKpaG": 4508
    },
    "molarMassGPerMol": 86.3,
    "liquidDensityKgPerM3At25C": 1075,
    "temperatureGlideF": 11.5,
    "hasSignificantGlide": true
  },
  "environmental": {
    "odp": 0,
    "gwp100Ar5": 1387,
    "gwp100Ar6": 1421,
    "atmosphericLifetimeYears": null,
    "snapStatus": "Listed acceptable for commercial refrigeration; replacement for R-404A and R-22 in medium/low-temp applications"
  },
  "lubricants": {
    "compatible": [
      "POE"
    ],
    "incompatible": [
      "MO",
      "AB"
    ],
    "notes": "POE required. Designed as a lower-GWP replacement for R-404A in commercial refrigeration. Significant glide (~5 K)."
  },
  "applications": [
    "Commercial refrigeration (supermarket cases, walk-in coolers)",
    "Medium and low-temperature refrigeration",
    "R-404A retrofit candidate"
  ],
  "replacementOptions": [
    "r-454c",
    "r-455a",
    "r-744"
  ],
  "replaces": [
    "r-404a",
    "r-22"
  ],
  "regulatoryStatus": {
    "epaPhaseoutComplete": false,
    "epaPhaseoutDate": null,
    "aimActAffected": true,
    "snapApproved": true
  },
  "ptChart": [],
  "ptTable": [
    {
      "psig": 0,
      "bubbleF": -51,
      "dewF": -39.9
    },
    {
      "psig": 1,
      "bubbleF": -48.6,
      "dewF": -37.5
    },
    {
      "psig": 2,
      "bubbleF": -46.2,
      "dewF": -35.2
    },
    {
      "psig": 3,
      "bubbleF": -44,
      "dewF": -32.9
    },
    {
      "psig": 4,
      "bubbleF": -41.9,
      "dewF": -30.8
    },
    {
      "psig": 5,
      "bubbleF": -39.8,
      "dewF": -28.8
    },
    {
      "psig": 6,
      "bubbleF": -37.8,
      "dewF": -26.9
    },
    {
      "psig": 7,
      "bubbleF": -35.9,
      "dewF": -25
    },
    {
      "psig": 8,
      "bubbleF": -34.1,
      "dewF": -23.2
    },
    {
      "psig": 9,
      "bubbleF": -32.4,
      "dewF": -21.4
    },
    {
      "psig": 10,
      "bubbleF": -30.6,
      "dewF": -19.7
    },
    {
      "psig": 11,
      "bubbleF": -29,
      "dewF": -18.1
    },
    {
      "psig": 12,
      "bubbleF": -27.4,
      "dewF": -16.5
    },
    {
      "psig": 13,
      "bubbleF": -25.8,
      "dewF": -15
    },
    {
      "psig": 14,
      "bubbleF": -24.3,
      "dewF": -13.5
    },
    {
      "psig": 16,
      "bubbleF": -21.4,
      "dewF": -10.6
    },
    {
      "psig": 18,
      "bubbleF": -18.6,
      "dewF": -7.8
    },
    {
      "psig": 20,
      "bubbleF": -16,
      "dewF": -5.2
    },
    {
      "psig": 22,
      "bubbleF": -13.5,
      "dewF": -2.7
    },
    {
      "psig": 24,
      "bubbleF": -11,
      "dewF": -0.3
    },
    {
      "psig": 26,
      "bubbleF": -8.7,
      "dewF": 2
    },
    {
      "psig": 28,
      "bubbleF": -6.5,
      "dewF": 4.2
    },
    {
      "psig": 29,
      "bubbleF": -5.4,
      "dewF": 5.3
    },
    {
      "psig": 31,
      "bubbleF": -3.3,
      "dewF": 7.4
    },
    {
      "psig": 34,
      "bubbleF": -0.2,
      "dewF": 10.4
    },
    {
      "psig": 37,
      "bubbleF": 2.7,
      "dewF": 13.3
    },
    {
      "psig": 40,
      "bubbleF": 5.5,
      "dewF": 16
    },
    {
      "psig": 43,
      "bubbleF": 8.2,
      "dewF": 18.7
    },
    {
      "psig": 46,
      "bubbleF": 10.8,
      "dewF": 21.2
    },
    {
      "psig": 49,
      "bubbleF": 13.2,
      "dewF": 23.7
    },
    {
      "psig": 52,
      "bubbleF": 15.6,
      "dewF": 26
    },
    {
      "psig": 55,
      "bubbleF": 17.9,
      "dewF": 28.3
    },
    {
      "psig": 59,
      "bubbleF": 20.9,
      "dewF": 31.2
    },
    {
      "psig": 63,
      "bubbleF": 23.8,
      "dewF": 34
    },
    {
      "psig": 67,
      "bubbleF": 26.5,
      "dewF": 36.7
    },
    {
      "psig": 83,
      "bubbleF": 36.5,
      "dewF": 46.6
    },
    {
      "psig": 101,
      "bubbleF": 46.5,
      "dewF": 56.3
    },
    {
      "psig": 121,
      "bubbleF": 56.2,
      "dewF": 65.9
    },
    {
      "psig": 142,
      "bubbleF": 65.4,
      "dewF": 74.9
    },
    {
      "psig": 154,
      "bubbleF": 70.2,
      "dewF": 79.6
    },
    {
      "psig": 167,
      "bubbleF": 75.1,
      "dewF": 84.4
    },
    {
      "psig": 181,
      "bubbleF": 80.2,
      "dewF": 89.3
    },
    {
      "psig": 196,
      "bubbleF": 85.3,
      "dewF": 94.3
    },
    {
      "psig": 212,
      "bubbleF": 90.5,
      "dewF": 99.3
    },
    {
      "psig": 229,
      "bubbleF": 95.7,
      "dewF": 104.3
    },
    {
      "psig": 246,
      "bubbleF": 100.7,
      "dewF": 109.1
    },
    {
      "psig": 264,
      "bubbleF": 105.6,
      "dewF": 113.9
    },
    {
      "psig": 284,
      "bubbleF": 110.9,
      "dewF": 119
    },
    {
      "psig": 304,
      "bubbleF": 115.9,
      "dewF": 123.8
    },
    {
      "psig": 325,
      "bubbleF": 121,
      "dewF": 128.6
    },
    {
      "psig": 348,
      "bubbleF": 126.2,
      "dewF": 133.6
    },
    {
      "psig": 349,
      "bubbleF": 126.4,
      "dewF": 133.8
    },
    {
      "psig": 372,
      "bubbleF": 131.4,
      "dewF": 138.5
    },
    {
      "psig": 397,
      "bubbleF": 136.6,
      "dewF": 143.4
    },
    {
      "psig": 423,
      "bubbleF": 141.8,
      "dewF": 148.3
    },
    {
      "psig": 450,
      "bubbleF": 146.9,
      "dewF": 153
    }
  ],
  "primaryDatasheet": {
    "manufacturer": "Honeywell",
    "tradeName": "Solstice N40",
    "publicationDate": "2019-09",
    "url": "https://www.honeywell-refrigerants.com/europe/wp-content/uploads/2019/10/3820_Solstice-N40_web.pdf",
    "resolution": "native pressure-indexed, irregular steps"
  },
  "dataSource": {
    "ptChartSource": "Honeywell Solstice® N40 (R-448A) Technical Data Sheet (Publication 3820, September 2019), pressure-temperature table, page 2",
    "ptChartGeneratedAt": "2026-07-14T13:42:31.547Z",
    "ptChartVerifiedAgainst": [
      "Honeywell Solstice N40 PT chart 2023",
      "ASHRAE Standard 34-2022 Designation R-448A"
    ],
    "propertiesSource": "Honeywell Solstice N40 datasheet + ASHRAE Standard 34-2022",
    "gwpSource": "IPCC AR5 Table 8.A.1 (composition-weighted)",
    "dataStatus": "manufacturer-datasheet",
    "primarySources": [
      {
        "type": "manufacturer-datasheet",
        "citation": "Honeywell International Inc., Solstice® N40 (R-448A) Technical Data Sheet, Publication 3820, September 2019 (pressure-temperature table, page 2).",
        "url": "https://www.honeywell-refrigerants.com/europe/wp-content/uploads/2019/10/3820_Solstice-N40_web.pdf",
        "scope": "Manufacturer-published PT chart with bubble and dew columns for R-448A (zeotropic HFC/HFO blend), plus physical properties table."
      }
    ]
  }
}