{
  "slug": "r-515b",
  "displayName": "R-515B",
  "altSpellings": [
    "R515B",
    "515B",
    "Solstice N15"
  ],
  "chemicalName": "Binary HFO/HFC azeotropic blend",
  "chemicalFormula": "R-1234ze(E)/R-227ea (91.1/8.9)",
  "ashraeNumber": "R-515B",
  "type": "hfo-blend",
  "safetyClass": "A1",
  "tradeNames": [
    {
      "name": "Solstice N15",
      "manufacturer": "Honeywell"
    }
  ],
  "composition": [
    {
      "component": "R-1234ze(E)",
      "massFraction": 0.911
    },
    {
      "component": "R-227ea",
      "massFraction": 0.089
    }
  ],
  "physical": {
    "boilingPointC": -18.9,
    "boilingPointF": -2,
    "critical": {
      "tempC": 108.6,
      "tempF": 227.5,
      "pressurePsia": 514,
      "pressurePsig": 499,
      "pressureKpaA": 3544,
      "pressureKpaG": 3443
    },
    "molarMassGPerMol": 117.5,
    "liquidDensityKgPerM3At25C": 1238,
    "temperatureGlideF": 0,
    "hasSignificantGlide": false
  },
  "environmental": {
    "odp": 0,
    "gwp100Ar5": 293,
    "gwp100Ar6": 311,
    "atmosphericLifetimeYears": null,
    "snapStatus": "Listed acceptable for centrifugal chillers"
  },
  "lubricants": {
    "compatible": [
      "POE",
      "PVE"
    ],
    "incompatible": [
      "MO"
    ],
    "notes": "Azeotrope. A1 classification (non-flammable). Lower GWP than R-515A. R-227ea content stays just above the minimum needed to maintain A1 classification."
  },
  "applications": [
    "Centrifugal chillers",
    "Medium-temperature commercial refrigeration"
  ],
  "replacementOptions": [],
  "replaces": [
    "r-134a"
  ],
  "regulatoryStatus": {
    "epaPhaseoutComplete": false,
    "epaPhaseoutDate": null,
    "aimActAffected": false,
    "snapApproved": true
  },
  "ptChart": [],
  "dataSource": {
    "ptChartSource": "Manufacturer datasheet: Honeywell Solstice N15 (R-515B) Technical Information",
    "ptChartGeneratedAt": "2026-06-05T07:54:52.836Z",
    "ptChartVerifiedAgainst": [
      "Honeywell Solstice N15 technical datasheet"
    ],
    "propertiesSource": "Honeywell Solstice N15 datasheet",
    "gwpSource": "IPCC AR5 Table 8.A.1 (composition-weighted)",
    "dataStatus": "manufacturer-datasheet-published",
    "primarySources": [
      {
        "type": "manufacturer-datasheet",
        "citation": "Honeywell International Inc., Solstice N15 (R-515B) Technical Information.",
        "url": "https://www.honeywell-refrigerants.com/americas/",
        "scope": "PT chart for R-515B (R-1234ze(E)/R-227ea 91.1/8.9 mass% azeotrope, A1 chiller refrigerant)."
      }
    ]
  }
}