{ "slug": "r-c318", "displayName": "R-C318", "altSpellings": [ "Rc318", "R-C318", "PFC-c318", "Octafluorocyclobutane" ], "chemicalName": "Octafluorocyclobutane", "chemicalFormula": "c-C4F8", "ashraeNumber": "R-C318", "type": "pfc", "safetyClass": "A1", "tradeNames": [], "composition": [], "physical": { "boilingPointC": -5.97, "boilingPointF": 21.25, "boilingPointDewC": null, "boilingPointDewF": null, "critical": { "tempC": 115.23, "tempF": 239.41, "pressurePsia": 402.8, "pressurePsig": 388.1, "pressureKpaA": 2777.5, "pressureKpaG": 2676.2 }, "molarMassGPerMol": 200.031, "liquidDensityKgPerM3At25C": null, "temperatureGlideF": 0, "hasSignificantGlide": false }, "environmental": { "odp": 0, "gwp": { "headline": { "value": 10300, "source": "ipcc_ar4" }, "ar4": { "value": 10300, "source": "ipcc_ar4" }, "ar5": { "value": 9540, "source": "ipcc_ar5" }, "ar6": { "value": 10200, "source": "ipcc_ar6" } }, "atmosphericLifetimeYears": 3200, "snapStatus": "Specialty applications; very high GWP and atmospheric lifetime" }, "lubricants": { "compatible": [ "POE", "PAO" ], "incompatible": [ "MO" ], "notes": "Perfluorocarbon (PFC) — extremely persistent in the atmosphere. Specialty uses; food propellant (FDA approved), semiconductor etching, electronics dielectric. Very limited refrigeration use." }, "applications": [ "Food aerosol propellant (specialty)", "Semiconductor etching gas", "Electronics dielectric fluid", "Specialty refrigeration (rare)" ], "replacementOptions": [], "replaces": null, "regulatoryStatus": { "epaPhaseoutComplete": false, "epaPhaseoutDate": null, "aimActAffected": false, "snapApproved": true }, "ptChart": [ { "tempF": -39, "tempC": -39.4, "bubblePsig": -11.81519, "dewPsig": -11.81519, "bubbleKpag": -81.462867, "dewKpag": -81.462867, "displayPsig": -11.81519, "displayKpag": -81.462867 }, { "tempF": -38, "tempC": -38.9, "bubblePsig": -11.722416, "dewPsig": -11.722416, "bubbleKpag": -80.823213, "dewKpag": -80.823213, "displayPsig": -11.722416, "displayKpag": -80.823213 }, { "tempF": -37, "tempC": -38.3, "bubblePsig": -11.627214, "dewPsig": -11.627214, "bubbleKpag": -80.166819, "dewKpag": -80.166819, "displayPsig": -11.627214, "displayKpag": -80.166819 }, { "tempF": -36, "tempC": -37.8, "bubblePsig": -11.529536, "dewPsig": 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