Thiophosphoryl fluoride

Thiophosphoryl fluoride
Names
	IUPAC name Trifluoro(sulfanylidene)-λ5-phosphane
	Other names Phosphorothioc trifluoride; Phosphorothioic trifluoride; Phosphorus fluoride sulfide; Phosphorus sulfurtrifluoride; Phosphorus thiofluoride; Thiophosphoryl trifluoride; Trifluorophosphine sulfide; Trifluoro-λ5-phosphanethione;
Identifiers
CAS Number	2404-52-6 ;
3D model (JSmol)	: Interactive image;
ChemSpider	121246 ;
PubChem CID	137585;
CompTox Dashboard (EPA)	DTXSID50178783 ;
	InChI InChI=1S/F3PS/c1-4(2,3)5 Key: LHGOOQAICOQNRG-UHFFFAOYSA-N ;
	SMILES : FP(F)(F)=S;
Properties
Chemical formula	PSF3
Molar mass	120.035 g/mol
Appearance	Colorless gas or liquid
Density	1.56g/cm3 liquid 4.906 g/L as gas
Melting point	−148.8 °C (−235.8 °F; 124.3 K)
Boiling point	−52.25 °C (−62.05 °F; 220.90 K)
Solubility in water	slight, Highly reactive
Structure
Molecular shape	Tetrahedral at the P atom
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Spontaneously flammable in air; toxic fumes
Flash point	very low
Related compounds
Related compounds	Phosphoryl trifluoride; Phosphorus trifluoride; Thiazyl trifluoride; Selenophosphoryl fluoride PSeF3; Thiophosphoryl chloride; Phosphorothioc chloride difluoride;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Thiophosphoryl fluoride is an inorganic molecular gas with formula P S F₃ containing phosphorus, sulfur and fluorine. It spontaneously ignites in air and burns with a cool flame. The discoverers were able to have flames around their hands without discomfort, and called it "probably one of the coldest flames known". The gas was discovered in 1888.

It is useless for chemical warfare as it burns immediately and is not toxic enough.