HFC-227ea

IdentificationSynonyms: 1,1,1,2,3,3,3-Heptafluoropropane (IUPAC); 2H-Heptafluoropropane; HFC-227, R-227; HFC227ea;CAS No.:431-89-0EC No: 207-079-2Molecular Weight: 170.03Molecular Formula: C3HF7b.p. (1 atm): -16.4°Cm.p.: -131°CDensity (16°C): 1.46g/mlVapor Pressure: 0.45MpaSolubility in water: 260mg/LODP: 0GWP: 3500PreparationOn industrial scale, HFC-227ea is prepared by addition reaction between hexafluoropropylene(HFP) and hydrofluoric acid under condition of catalyst: CF3-CF=CF2 +HF →CF3-CHF2-CF3Application1) As the first non ozone-depleting alternative for Halon 1301, HFC-227ea (Heptafluoropropane) is used in fire suppression systems in data-processing and telecommunication facilities. Effective fire suppression requires introducing a concentration of the HFC-227ea agent between 6.25% and 9% depending on the hazard being protected. Its NOAEL level for cardiac sensitization is 9%. The US EPA allows concentration of 9% volume in occupied spaces without mandated egress time, or up to 10.5% for a limited time. Most fire suppression systems are designed to provide concentration of 6.25-9%.In addition, HFC-227ea leaves no residue on valuable equipment after discharge. HFC-227ea contains no chlorine or bromine atoms, presenting no ozone depletion effect, but its global warming potential is high. Its atmospheric lifetime is approximated between 31 and 42 years.2)HFC-227ea is used as an aerosol propellant in pharmaceutical metered dose inhalers such as those used for dispensing asthma medication.SpecificationParametersSpecificationHFC-227ea purity, %99.9 minmoisture, mg/kg10 maxacidity, mg/kg1 maxnon-volatiles, wt%0.01 maxStandard Packing1000kgs/926L steel cylinder, 13 Cylinders/FCL, or ISO TankRisks and Safety InformationToxicity LC50(4hr, rat), ppm: 800000 minUN 3296. Class 2.2At high temperatures, HFC-227ea (heptafluoropropane) will decompose and produce hydrogen fluoride, presenting sharp, pungent odour, which can be perceived in concentrations far below a dangerous level. Prior to re-entry of a room where HFC-227ea system has been activated to suppress a fire, the atmosphere should be tested.