Major HFO Molecules

Designation Complete name Formula Cas number GWP
AR5 unless stated
Main Potential Applications
 HCFO 1224ydZ  2,3,3,3 Tetrafluoro-1-chloroprop-1 ene CF3-CF=CHCl  111512-60-8 <1 (3)ODP=0.00012 Centrifugal chillers, working fluid for Organic Rankine Cycle, high temperature heat pumps
 HBFO 1233xfB  2-bromo-3,3,3-trifluoropropene
CF3CBr=CH2  1514-82-5 0.26 Fire extinguisher agent
HCFO 1233zdE Trans 1-Chloro-3,3,3-
Trans-CHCl=CHCF3 2730-43-0 GWP=1
Insulating foams, precision solvents
chiller applications, high temperature heat pumps, working fluid for organic Rankine cycle
HFO 1234yf 2,3,3,3- tetrafluoroprop-1-ene CF3CF=CH2 754-12-1 <1 Mobile air-conditioning
stationary air conditioning
and refrigeration
HFO 1234zeE Trans-1,3,3-tetrafluoroprop-1-ene Trans- CF3CH=CFH 29118-24-9 <1 Aerosol Propellants, chillers,
refrigeration, air conditioning and insulations foams
HFO 1336mzz(Z) 1,1,1,4,4,4-hexafluorobut-2-ene cis-
692-49-9 2 Insulating foams, blowing agent, chillers, high temperature heat pumps and working fluid for organic Rankine cycle, fire extinguishant, solvent.


See also: Hydrofluoroolefins (HFOs)


1) See Selecting and using GWP values
2)  IPCC Working Group I – The Physical Science Basis – Chap.8 Annex 8.A.1
3) Measured by the National Institute of Advanced Industrial Science and Technology (AIST), Japan, GWP calculated according to the IPCC AR5 method
4) Very short lived substances (VSLS) have chemical lifetimes comparable with tropospheric transport time scales, with the result that the amount of the substance in the atmosphere depends on where and when (time of year) it is released. In practice, this happens for species with atmospheric lifetimes of a few months or less. From a regulatory point of view this means that VSLS cannot be included in the normal categories of the Montreal Protocol; not only is their contribution to ozone depletion very low but it is highly variable between countries and regions. For more detail see Learn About HCFO-1224yd(Z), HCFO-1233zdE, HBFO-1233xfB, Stratospheric Ozone and Climate Change
5) GWP according to the Report of the 2010 Assessment of the Scientific Assessment Panel (SAP) of the Montreal Protocol, Tables 1-11, citing two peer-reviewed scientific references