perchloryl fluoride perchloryl fluoride perchloryl fluoride is a reactive gas with the chemical formula clo3f. 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. 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 y 3d model (jsmol) interactive image chemspider 22680 y echa infocard 100.028.660 ec number 231-526-0 pubchem cid 24258 rtecs number sd1925000 unii 73nc8xm516 y comptox dashboard (epa) dtxsid60894169 inchi inchi=1s/clfo3/c2-1(3,4)5 ykey: xhfxmnzyikfcpn-uhfffaoysa-n yinchi=1/clfo3/c2-1(3,4)5key: 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) 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: 373 thermochemistry std molarentropy (s⦵298) 278.97 j/(mol*k) std enthalpy offormation (δfh⦵298) -21.42 kj/mol : 380 hazards occupational safety and health (ohs/osh): main hazards oxidizing, toxic. non-corrosive. nfpa 704 (fire diamond) 3 0 3ox 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 , 100 kpa). n verify (what is yn ?) infobox references in spite of its small enthalpy of formation (δhf° = −5.2 kcal/mol), it is kinetically stable, decomposing only at 400 °c.: 380 it is quite reactive towards reducing agents and anions, however, with the chlorine atom acting as an electrophile.: 382 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. synthesis and chemistry perchloryl fluoride is produced primarily by the fluorination of perchlorates. antimony pentafluoride is a commonly used fluorinating agent:: 372–373 clo−4 + 3 hf + 2 sbf5 → clo3f + h3o+ + 2 sbf−6 clo3f reacts with alcohols to produce alkyl perchlorates, which are extremely shock-sensitive explosives. in the presence of a lewis acid, it can be used for introducing the –clo3 group into aromatic rings via electrophilic aromatic substitution. applications perchloryl fluoride is used in organic chemistry as a mild fluorinating agent.: 383 it was the first industrially relevant electrophilic fluorinating agent, used since the 1960s for producing fluorinated steroids. in the presence of aluminum trichloride, it has also been used as an electrophilic perchlorylation reagent for aromatic compounds. perchloryl fluoride was investigated as a high performance liquid rocket fuel oxidizer. in comparison with chlorine pentafluoride and bromine pentafluoride, it has significantly lower specific impulse, but does not tend to corrode tanks. it does not require cryogenic storage. rocket fuel chemist john drury clark reported in his book ignition! that perchloryl fluoride is completely miscible with all-halogen oxidizers such as chlorine trifluoride and chlorine pentafluoride, and such a mixture provides the needed oxygen to properly burn carbon-containing fuels. it can also be used in flame photometry as an excitation source. safety perchloryl fluoride is toxic, with a tlv of 3 ppm. it is a strong lung- and eye-irritant capable of producing burns on exposed skin. its idlh level is 100 ppm. symptoms of exposure include dizziness, headaches, syncope, and cyanosis. exposure to toxic levels causes severe respiratory tract inflammation and pulmonary edema.