{ "slug": "r-717", "displayName": "R-717", "altSpellings": [ "R717", "Ammonia", "NH3" ], "chemicalName": "Ammonia", "chemicalFormula": "NH3", "ashraeNumber": "R-717", "type": "natural", "safetyClass": "B2L", "tradeNames": [], "composition": [], "physical": { "boilingPointC": -33.32, "boilingPointF": -27.97, "boilingPointDewC": null, "boilingPointDewF": null, "critical": { "tempC": 132.41, "tempF": 270.34, "pressurePsia": 1648.1, "pressurePsig": 1633.4, "pressureKpaA": 11363.4, "pressureKpaG": 11262.1 }, "molarMassGPerMol": 17.031, "liquidDensityKgPerM3At25C": null, "temperatureGlideF": 0, "hasSignificantGlide": false }, "environmental": { "odp": 0, "gwp": { "headline": { "value": 1, "source": "cfr_84_64b" }, "ar4": null, "ar5": null, "ar6": null, "note": "IPCC does not assess ammonia as a greenhouse gas; 40 CFR 84.64(b) lists 1." }, "atmosphericLifetimeYears": 0.01, "snapStatus": "Listed acceptable for industrial refrigeration; class B2L — toxic and mildly flammable" }, "lubricants": { "compatible": [ "MO", "AB", "PAO" ], "incompatible": [ "POE" ], "notes": "Class B2L — TOXIC and mildly flammable. Workplace exposure limit (NIOSH IDLH 300 ppm; OSHA TWA 50 ppm). Industrial refrigeration standard for decades; charge handling, leak detection, and ventilation are strict regulatory requirements. Ammonia attacks copper — use steel piping and components." }, "applications": [ "Industrial refrigeration (food processing, cold storage warehouses)", "Ice rinks", "Petrochemical processing", "Large heat pumps (commercial/industrial)" ], "replacementOptions": [], "replaces": null, "regulatoryStatus": { "epaPhaseoutComplete": false, "epaPhaseoutDate": null, "aimActAffected": false, "snapApproved": true }, "ptChart": [ { "tempF": -40, "tempC": -40, "bubblePsig": -4.306372, "dewPsig": -4.306372, "bubbleKpag": -29.69139, "dewKpag": -29.69139, "displayPsig": -4.306372, "displayKpag": -29.69139 }, { "tempF": -39, "tempC": -39.4, "bubblePsig": -3.993306, "dewPsig": -3.993306, "bubbleKpag": -27.532876, "dewKpag": -27.532876, "displayPsig": -3.993306, "displayKpag": -27.532876 }, { "tempF": -38, "tempC": -38.9, "bubblePsig": -3.672584, "dewPsig": -3.672584, "bubbleKpag": -25.321575, "dewKpag": -25.321575, "displayPsig": -3.672584, "displayKpag": -25.321575 }, { "tempF": -37, "tempC": -38.3, 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