IUPAC Name: Sulfuryl chloride fluoride
Synonyms: Chloridofluoridodioxidosulfur ; Chloridofluoridodioxidosulfur ; Sulfonyl chloride fluoride ; Chloro fluoro sulfone ; Chlorofluorodioxosulfur
Product Categories: Chemical Synthesis;Compressed and Liquefied GasesMicro/Nanoelectronics;Electronic Chemicals;Fluorides;Synthetic Reagents
CAS NO: 13637-84-8
Molecular Formula of Sulfuryl chloride fluoride (CAS NO.13637-84-8) : ClFO₂S
Molecular Weight of Sulfuryl chloride fluoride (CAS NO.13637-84-8) :118.52
Molecular Structure of Sulfuryl chloride fluoride (CAS NO.13637-84-8) :
EINECS: 237-126-2
Index of Refraction: 1.391
Surface Tension: 36.5 dyne/cm
Density: 1.784 g/cm³
Flash Point: 113 °C
Enthalpy of Vaporization: 24.5 kJ/mol
Boiling Point: 7.1 °C at 760 mmHg
Vapour Pressure: 1420 mmHg at 25°C
Melting point: -125 °C
Sensitive: Moisture Sensitive
Appearance:clear colorless to light yellow liquid

 Sulfuryl chloride fluoride (CAS NO.13637-84-8) is employed as a solvent for highly oxidizing compounds.

The laboratory-scale synthesis begins with the preparation of potassium fluorosulfite
SO₂ + KF → KSO₂F
This salt is then chlorinated to give sulfuryl chloride fluoride
KSO₂F + Cl₂ → SO₂ClF + KCl
Further heating (180 °C) of potassium fluorosulfite with the sulfuryl chloride fluoride gives sulfuryl fluoride.
Alternatively, sulfuryl chloride fluoride can be prepared without using gases as educts treating sulfuryl chloride with ammonia fluoride or potassium fluoride in trifluoro acetic acid
SO₂Cl₂ + NH₄F → SO₂ClF + NH₄Cl

Reported in EPA TSCA Inventory.

Poison by inhalation. When heated to decomposition it emits very toxic fumes of Cl⁻, F⁻, and SO_x. See also FLUORIDES, CHLORIDES, and SULFIDES.
Hazard CodesT,C
Risk Statements 14-23/24/25-34
R14 :Reacts violently with water. 
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed. 
R34:Causes burns.
Safety Statements 26-27-28-36/37/39-45
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S27:Take off immediately all contaminated clothing. 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR UN 2922 8/PG 1
WGK Germany 3
RTECS WT4900000
Hazard Note Corrosive/Toxic/Moisture sensitive
HazardClass 2.3
 

OSHA PEL: TWA 2.5 mg(F)/m³
ACGIH TLV: TWA 2.5 mg(F)/m³; BEI: 3 mg/g creatinine of fluorides in urine prior to shift; 10 mg/g creatinine of fluorides in urine at end of shift.
NIOSH REL: (Inorganic Fluorides) TWA 2.5 mg(F)/m³