2,3,3,3-Tetrafluoropropene

2,3,3,3-Tetrafluoropropene
Names
	Preferred IUPAC name 2,3,3,3-Tetrafluoroprop-1-ene
	Other names HFO-1234yf; R1234yf; R-1234yf; 2,3,3,3-Tetrafluoropropylene
Identifiers
CAS Number	754-12-1 ;
3D model (JSmol)	Interactive image; Interactive image;
ChemSpider	2057041 ;
ECHA InfoCard	100.104.879
EC Number	468-710-7;
PubChem CID	2776731;
UNII	P5N89242X3 ;
UN number	3161
CompTox Dashboard (EPA)	DTXSID4074728 ;
	InChI InChI=1S/C3H2F4/c1-2(4)3(5,6)7/h1H2 Key: FXRLMCRCYDHQFW-UHFFFAOYSA-N ; InChI=1/C3H2F4/c1-2(4)3(5,6)7/h1H2 Key: FXRLMCRCYDHQFW-UHFFFAOYAB;
	SMILES C=C(F)C(F)(F)F; FC(=C)C(F)(F)F;
Properties
Chemical formula	C3H2F4
Molar mass	114 g/mol
Appearance	Colorless gas
Density	1.1 g/cm3 at 25 °C (liquid); 4 (gas, relative, air is 1)
Boiling point	−30 °C (−22 °F; 243 K)
Solubility in water	198.2 mg/L at 24 °C, 92/69/EEC, A.6
log P	2.15, n-octanol/water, 92/69/EEC, A.8
Vapor pressure	6,067 hPa at 21.1 °C; 14,203 hPa at 54.4 °C
Hazards
	GHS labelling:
Pictograms
Hazard statements	H220
Precautionary statements	P210, P260, P281, P308+P313, P410+P403
Autoignition; temperature	405 °C (761 °F; 678 K)
Explosive limits	6.2% vol.; 12.3% vol.
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

2,3,3,3-Tetrafluoropropene, HFO-1234yf, is a hydrofluoroolefin (HFO) with molecular formula CH₂=CFCF₃. Its primary application is as a refrigerant with low global warming potential (GWP).

As a refrigerant, it is designated R-1234yf and marketed under the names Opteon YF by Chemours and as Solstice YF by Honeywell. R-1234yf is also a component of zeotropic refrigerant blend R-454B.

HFO-1234yf has a GWP less than carbon dioxide, itself 1,430 times less potent than R-134a. For this reason, 2,3,3,3‑tetrafluoropropene is the pre-eminent replacement for R-134a in vehicular air conditioners. As of 2022, 90% of new U.S. vehicles are estimated to use HFO-1234yf.

Unlike previous vehicular refrigerants, 2,3,3,3‑tetrafluoropropene is flammable; how much risk this poses is discussed below. One drawback is it breaks down into short-chain perfluorinated carboxylic acids (PFCAs), which are persistent organic pollutants.