{
  "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": [],
  "dataSource": {
    "ptChartSource": "Manufacturer datasheet: Honeywell Solstice N40 (R-448A) PT Chart",
    "ptChartGeneratedAt": "2026-06-05T07:54:28.518Z",
    "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-published",
    "primarySources": [
      {
        "type": "manufacturer-datasheet",
        "citation": "Honeywell International Inc., Solstice N40 (R-448A) PT Chart (PDF, published technical data sheet).",
        "url": "https://prod-edam.honeywell.com/content/dam/honeywell-edam/pmt/oneam/en-us/refrigerants/documents/hon-ess-am-3161690-adm-tds-pt-chart-solstice-n40-a4-en.pdf",
        "scope": "Manufacturer-published PT chart with bubble and dew columns for R-448A (zeotropic HFC/HFO blend)."
      },
      {
        "type": "manufacturer-physical-properties",
        "citation": "Honeywell Solstice N40 Physical Properties brochure.",
        "url": "https://www.honeywell-refrigerants.com/europe/wp-content/uploads/2019/10/3820_Solstice-N40_web.pdf"
      }
    ]
  }
}