Perchloryl fluoride

Perchloryl fluoride
Names
	IUPAC name Perchloryl fluoride
	Other names Chlorine oxyfluoride; Perchlorofluoride; Chlorine fluorine oxide; Trioxychlorofluoride; Perchloric acid fluoride;
Identifiers
CAS Number	7616-94-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	22680 ;
ECHA InfoCard	100.028.660
EC Number	231-526-0;
PubChem CID	24258;
RTECS number	SD1925000;
UNII	73NC8XM516 ;
CompTox Dashboard (EPA)	DTXSID60894169 ;
	InChI InChI=1S/ClFO3/c2-1(3,4)5 Key: XHFXMNZYIKFCPN-UHFFFAOYSA-N ; InChI=1/ClFO3/c2-1(3,4)5 Key: XHFXMNZYIKFCPN-UHFFFAOYAO;
	SMILES FCl(=O)(=O)=O;
Properties
Chemical formula	ClO3F
Molar mass	102.4496 g/mol
Appearance	Colorless gas
Odor	sweet odor
Density	1.434 g/cm3
Melting point	−147.8 °C (−234.0 °F; 125.3 K)
Boiling point	−46.7 °C (−52.1 °F; 226.5 K)
Critical point (T, P)	95.2 °C (203.4 °F; 368.3 K), 53 standard atmospheres (5,400 kPa; 780 psi)
Solubility in water	0.06 g/(100 ml) (20 °C), slow hydrolysis
Vapor pressure	10.5 atm (20 °C)
Viscosity	3.91 x 10−3 Pa·s (@ melting point)
Structure
Molecular shape	Tetrahedral
Thermochemistry
Std molar; entropy (S⦵298)	278.97 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−21.42 kJ/mol
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	oxidizing, toxic. Non-corrosive.
NFPA 704 (fire diamond)	3 0 3 OX
Threshold limit value (TLV)	3 ppm
	Lethal dose or concentration (LD, LC):
LC50 (median concentration)	385 ppm (rat, 4 hr); 451 ppm (dog, 4 hr)
LCLo (lowest published)	2000 ppm (rat, 40 min); 451 ppm (dog, 4 hr)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 3 ppm (13.5 mg/m3)
REL (Recommended)	TWA 3 ppm (14 mg/m3) ST 6 ppm (28 mg/m3)
IDLH (Immediate danger)	100 ppm
	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

Perchloryl fluoride is a reactive gas with the chemical formula Cl O₃F. It has a characteristic sweet odor that resembles gasoline and kerosene. It is toxic and is a powerful oxidizing and fluorinating agent. It is the acid fluoride of perchloric acid.

In spite of its small enthalpy of formation (Δ_fH° = −5.2 kcal/mol (−22 kJ/mol)), it is kinetically stable, decomposing only at 400 °C. It is quite reactive towards reducing agents and anions, however, with the chlorine atom acting as an electrophile. It reacts explosively with reducing agents such as metal amides, metals, hydrides, etc. Its hydrolysis in water occurs very slowly, unlike that of chloryl fluoride.