Sulfur tetrafluoride

IUPAC Name: 2-(5-benzoylthiophen-2-yl)Propanoic acid
Product Name: Sulfur tetrafluoride
Synonyms: Sulfur fluoride
Molecular Structure : 
Molecular Formula : SF₄
Molecular Weight: 108.05
CAS : 7783-60-0
EINECS:  232-013-4
Index of Refraction: 1.229     
Surface Tension: 10.6 dyne/cm 
Density: 1.56 g/cm³ 
Melting point  -120.5 ºC
Boiling point  4.84 ºC
Vapor pressure:  140 psi ( 21 °C)

Sulfur tetrafluoride (CAS NO.7783-60-0) is used as a fluorinating agent, extraction waterproof, anti-oil, lubricating oil additives, surface treatment agent, medicine, anesthetics, fiber processing, and film production.

1.Sulfur tetrafluoride (7783-60-0) can be derived by direct reaction of sulfur with fluorine.
2.Sulfur tetrafluoride (7783-60-0) can be obtained by the sulfur dioxide and sodium fluoride in acetonitrile suspension, reflux 2h at 77 °C .

Reported in EPA TSCA Inventory. EPA Extremely Hazardous Substances List.

Hazard Codes  T+,C,T
Risk Statements  14-26-34-37
14:  Reacts violently with water 
16:  Explosive when mixed with oxidizing substances 
34:  Causes burns 
37:  Irritating to the respiratory system 
Safety Statements  26-36/37/39-38-45
36:  Wear suitable protective clothing 
38:  In case of insufficient ventilation, wear suitable respiratory equipment 
45:  In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) 
36/37/39:  Wear suitable protective clothing, gloves and eye/face protection 
RIDADR  UN 2418 2.3

OSHA PEL: CL 0.1 ppm
ACGIH TLV: CL 0.1 ppm; 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
DOT Classification:  2.3; Label: Poison Gas

1.General Description :Sulfur tetrafluoride is a colorless gas with a distinct sulfur odor. Sulfur tetrafluoride is highly toxic by inhalation and a strong irritant to skin, eyes and mucous membranes. Sulfur tetrafluoride reacts vigorously with water and acids to yield toxic fluoride and sulfur oxide fumes and an acidic solution. Sulfur tetrafluoride is heavier than air. Under prolonged exposure to fire or intense heat the containers may violently rupture or rocket. Sulfur tetrafluoride is used as a fluoridizing agent and as an oil repellent.
2.Air & Water Reactions: Violent reaction with water. Sulfur tetrafluoride reacts vigorously with water and acids to yield toxic fluoride and sulfur oxide fumes and an acidic solution.
3.Reactivity Profile: Sulfur tetrafluoride is a highly toxic and corrosive gas. On contact with water, steam, or mineral acids Sulfur tetrafluoride decomposes and produces toxic and highly irritating fumes. When heated to decomposition Sulfur tetrafluoride emits very toxic fluoride and sulfur oxides fumes]. Explosively violent reactions with 2-(hydroxymethyl)furan or 2-methyl-3-butyn-2-ol even below -50° C have been recorded.Ignition or explosion may occur on contact with dioxygen difluoride even below -100° C .
4.Health Hazard :Sulfur tetrafluoride is highly toxic by inhalation; it is a strong irritant to eyes and mucous membranes. Poisonous; may be fatal if inhaled. Contact may cause burns to skin and eyes. Contact with liquid may cause frostbite.
5.Fire Hazard :Container may explode in heat of fire. When heated to decomposition, Sulfur tetrafluoride emits very toxic fumes of fluorides and sulfur oxides. Reacts violently with water. Sulfur tetrafluoride is decomposed by concentrated sulfuric acid. Thermostable to 1112F.