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According to ASHRAE standard 34, the R-number of a chemical refrigerant is assigned systematically according to its molecular structure and has between two and four digits. If there are carbon -carbon multiple bonds , there are four digits in all: the number of these bonds is the first digit and the number of carbon atoms minus one (C-1) is next.
1,1,1,2-Tetrafluoroethane (also known as norflurane (), R-134a, Klea 134a, Freon 134a, Forane 134a, Genetron 134a, Green Gas, Florasol 134a, Suva 134a, HFA-134a, or HFC-134a) is a hydrofluorocarbon (HFC) and haloalkane refrigerant with thermodynamic properties similar to R-12 (dichlorodifluoromethane) but with insignificant ozone depletion potential and a lower 100-year global warming ...
Download QR code; Print/export ... Devices, small, hydrocarbon gas powered or Hydrocarbon gas ... 1,1,1,2-Tetrafluoroethane or Refrigerant gas R 134a UN 3160: 2.3: ...
Download QR code; Print/export Download as PDF; ... Colorless gas Melting point: −89 °C (−128 °F; 184 K) ... (R-134a). It is used as a foam expansion agent and ...
Automobile manufacturers began phasing in R-134a around 1993 [citation needed]. When older units leak or require repair involving removal of the refrigerant, retrofitment to a refrigerant other than R-12 (most commonly R-134a) is required in some jurisdictions. The United States does not require such conversion.
Download QR code; Print/export Download as PDF; Printable version; In other projects Wikidata item; ... Refrigerant gas R404A: UN 3338: 2.2: Refrigerant gas R407A: UN ...
A DuPont R-134a refrigerant. A refrigerant is a working fluid used in cooling, heating or reverse cooling and heating of air conditioning systems and heat pumps where they undergo a repeated phase transition from a liquid to a gas and back again.
Chloropentafluoroethane or Refrigerant gas R 115 UN 1021: 2.2: 1-Chloro-1,2,2,2-tetrafluoroethane or Refrigerant gas R 124 UN 1022: 2.2: Chlorotrifluoromethane or Refrigerant gas R 13 UN 1023: 2.3: Coal gas, compressed UN 1024 to 1025? (UN No.s no longer in use) UN 1026: 2.3: Cyanogen: UN 1027: 2.1: Cyclopropane: UN 1028: 2.2 ...