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1,1,1,2,3,3,3-Heptafluoropropane

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(Redirected fromHFA 227)
1,1,1,2,3,3,3-Heptafluoropropane[1]
The structure of 1,1,1,2,3,3,3-heptafluoropropane
Heptafluoropropane
Names
Preferred IUPAC name
1,1,1,2,3,3,3-Heptafluoropropane
Other names
Heptafluoropropane
Apaflurane
HFC-227ea
R-227ea
HFC-227
FM-200
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
ECHA InfoCard 100.006.437Edit this at Wikidata
KEGG
UNII
UN number UN3296
  • InChI=1S/C3HF7/c4-1(2(5,6)7)3(8,9)10/h1HcheckY
    Key: YFMFNYKEUDLDTL-UHFFFAOYSA-NcheckY
  • InChI=1/C3HF7/c4-1(2(5,6)7)3(8,9)10/h1H
    Key: YFMFNYKEUDLDTL-UHFFFAOYAL
  • FC(F)(F)C(F)C(F)(F)F
Properties
C3HF7
Molar mass 170.03 g/mol
Density 1.46 g/cm3at -16 °C
Melting point −131 °C (−204 °F; 142 K)
Boiling point −16.4 °C (2.5 °F; 256.8 K)
Hazards
NFPA 704(fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
1
0
1
Related compounds
Related compounds
 1,1,1,2,2,3,3-Heptachloropropane
Except where otherwise noted, data are given for materials in theirstandard state(at 25 °C [77 °F], 100 kPa).

1,1,1,2,3,3,3-Heptafluoropropane,also calledheptafluoropropane,HFC-227ea(ISOname),HFC-227orFM-200,as well asapaflurane(INN), is a colourless, odourless gaseoushalocarboncommonly used as agaseous fire suppressionagent.

Chemistry

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Its chemical formula is CF3-CHF-CF3,or C3HF7.With a boiling point of −16.4 °C, it is a gas at room temperature. It is slightly soluble in water (260 mg/L).

Use

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HFC-227ea is used infire suppression systemsthat protect data processing and telecommunication facilities, and in fire suppression of many flammable liquids and gases. HFC-227ea is categorized as a Clean Agent and is governed byNFPA 2001 - Standard for Clean Agent Fire Extinguishing Systems.Effective fire suppression requires introducing a concentration of the HFC-227ea agent between 6.25% and 9% depending on the hazard being suppressed. ItsNOAELfor cardiac sensitization is 9%. TheUnited States Environmental Protection Agencyallows 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%.

The HFC-227ea fire suppression agent was the first non-ozone-depleting replacement forHalon 1301.[citation needed]In addition, HFC-227ea leaves no residue on valuable equipment after discharge.[2]

HFC-227ea contains no chlorine or bromine atoms, presenting noozone depletioneffect. Its atmospheric lifetime is approximated between 31 and 42 years. It leaves no residue or oily deposits and can be removed by ventilation of the affected space.

As anaerosolpropellant,HFC-227ea is used in pharmaceutical metered dose inhalers such as those used for dispensingasthmamedication.

Safety

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At high temperatures, heptafluoropropane will decompose and producehydrogen fluoride.The decomposition produces a sharp, pungent odour, which can be perceived in concentrations far below a dangerous level. Other decomposition products includecarbonyl fluoride,carbon monoxideandcarbon dioxide.Prior to re-entry of a room where HFC-227ea system has been activated to suppress a fire, the atmosphere should be tested. An Acid Scavenging Additive added to heptafluoropropane reduces the amount of hydrogen fluoride. Contact with liquid HFC-227ea may causefrostbite.

Climate change considerations

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Heptafluoropropane (HFC-227ea) contributes toclimate change.It has aglobal warming potential(GWP) of 3,220 over 100 years.[3]

Due to its high GWP, the HFC-227ea has been included in the list of controlled substances of theMontreal Protocol(2016 Kigali amendment, in effect in January 2019).[4]Under EU regulations, production, imports and sales of HFC-227ea in spray cans such as freeze sprays or dusters have been prohibited since 2014, as the GWP is over the limit of 150 for these applications.[5][6][7]

Tradenames for HFC-227ea used as fire suppression agent

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See also

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Other fire suppression agents:

References

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  1. ^NIST datapage for heptafluoropropane
  2. ^"Fike FE-227 Product Page".Archived fromthe originalon 2007-10-09.Retrieved2006-12-12.
  3. ^GOV.UK: Calculate the carbon dioxide equivalent quantity of an F gas.Retrieved on 2018-01-25.
  4. ^Montreal Protocol Section 1.1. including 2016 Kigali amendment.
  5. ^"Regulation (EU) No 517/2014 of the European Parliament and of the Council of 16 April 2014 on fluorinated greenhouse gases and repealing Regulation (EC) No 842/2006 — European Environment Agency".eea.europa.eu.Retrieved2021-03-11.
  6. ^"EU legislation to control F-gases".Climate Action - European Commission.2016-11-23.Retrieved2021-03-11.
  7. ^"ILT onderschept illegale spuitbussen in Rotterdamse haven - Nieuwsbericht - Inspectie Leefomgeving en Transport (ILT)".ilent.nl(in Dutch).Ministry of Infrastructure and Water Management.2020-08-31.Retrieved2021-03-11.
  8. ^abc"Substitutes in Total Flooding Agents".United States Environmental Protection Agency.United States government.20 November 2014.Retrieved3 May2019.
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