Chemistry informtion about Perchloryl Fluoride (CAS NO.7616-94-6) is:
IUPAC Name: Perchloryl Fluoride
Synonyms: Perchloryl Fluoride ; Chlorine Oxyfluoride ; Chlorine Trioxide Fluoride ; Chloryl Fluoroxide ; Fluorochlorine(Vii) Trioxide ; Hyperchloric Acid Fluoride
MF: ClFO₃
MW: 70.4508032
EINECS: 231-526-0 
Density 1.4 g/cm³
Melting point: −147.8 °C
Boiling point: −46.7 °C
Following is the molecular structure of Perchloryl Fluoride (CAS NO.7616-94-6) is:

Perchloryl Fluoride (CAS NO.7616-94-6) is used in organic chemistry as a mild fluorinating agent. It was the first industrially-relevant electrophilic fluorinating agent, used since the 1960s for producing fluorinated steroids.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.It can also be used in flame photometry as an excitation source.

Reported in EPA TSCA Inventory.

A poison gas which forms methemoglobin in the body and destroys red cells causing anemia, anorexia, and cyanosis. Recovery is said to be rapid, leaving no permanent physiological damage. Can be absorbed through the skin. Its odor can be detected as low as 10 ppm although this cannot be relied upon as an indication of toxic concentration in air. While non-flammable, it supports combustion. It is a powerful oxidizer. Moderately explosive. Potentially explosive reactions with combustible gases or vapors. benzene + aluminum trichloride, benzocyclobutene + butyllithium + potassium tert-butoxide, calcium acetylide, potassium cyanide, potassium thiocyanate, sodium iodide, charcoal, ethyl-4-fluorobenzoylacetate, hydrocarbons, hydrogen sulfide, nitrogen oxide, sulfur dichloride, vinylidene chloride, 3α-hydroxy-5β-androstane-11,17-dione-17-hydrazone, lithiated compounds, 2-lithio(dimethylamino-methyl)ferroxene, methyl-2-bromo-5,5-ethylene dioxy(2,2,1)bicycloheptane-7-carboxylate, aliphatic heterocyclic amines, sodium methoxide + methanol, vinylidene chloride. Reacts to form explosive products with nitrogenous bases (e.g., isopropylamine, isobutylamine, aniline, phenyl hydrazine, 1,2-diphenyl hydrazine), sawdust, lampblack. Violent reaction with finely divided organic materials. A fluorinating agent in chemical synthesis, and an oxidant in rocket fuel. When heated to decomposition it emits toxic fumes of F⁻ and Cl⁻. See also FLUORINE and PERCHLORATES. 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 385 ppm. Symptoms of exposure include dizziness, headaches, syncope, and cyanosis. Exposure to toxic levels causes severe respiratory tract inflammation and pulmonary edema.
RIDADR: 3157
HazardClass: 2.2

OSHA PEL: TWA 3 ppm; STEL 6 ppm
ACGIH TLV: TWA 3 ppm; STEL 6 ppm
DOT Classification:  2.3; Label: Poison Gas, Oxidizer

Perchloryl fluoride is produced primarily by the fluorination of perchlorates. Antimony pentafluoride is a commonly-used fluorinating agent:
ClO⁻₄ + 3 HF + 2 SbF₅ → FClO₃ + H₃O+ + 2 SbF⁻₆
FClO₃ reacts with alcohols to produce alkyl perchlorates, which are extremely shock-sensitive explosives.Using Friedel-Crafts catalysts, it can be used for introducing the –ClO₃ group into aromatic rings via electrophilic aromatic substitution.

Perchloryl Fluoride (CAS NO.7616-94-6) is a colorless, non corrosive gas with a characteristic sweet odor. Contact with the material may cause irritation to skin, eyes, and mucous membranes. Perchloryl fluoride is very toxic by inhalation and skin absorption. Under prolonged exposure to fire or intense heat the containers may violently rupture and rocket.It can slightly soluble in water. Perchloryl fluoride is a propellant and a powerful oxidant. It ignites upon contact with alcohols, amines, ammonia, beryllium alkyls, boranes, dicyanogen, hydrazines, hydrocarbons, hydrogen, nitroalkanes, powdered metals, silanes, or thiols [Bretherick 1979. p.174]. It is toxic and may be fatal if inhaled or absorbed through skin. Fire will produce irritating, corrosive and/or toxic gases. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Runoff from fire control may cause pollution. It does not burn but will support combustion. Vapors from liquefied gas are initially heavier than air and spread along ground. These are strong oxidizers and will react vigorously or explosively with many materials including fuels. May ignite combustibles (wood, paper, oil, clothing, etc.). Some will react violently with air, moist air and/or water. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.