7783-60-0 Usage
Selective organic fluorinating agent
Sulfur tetrafluoride is a selective organic fluorinating agent, S atoms form σ bond with sp3d hybrid orbitals on its molecular structure, molecular shape is distorted tetrahedral, at normal temperature and pressure, it is colorless gas with strong stimulus foul odor of gas which similar to sulfur dioxide, it is toxic, it does not burn and explode in the air, at 600 ℃ it remains stable. It strong hydrolyzes and emits white smoke in the air. When encounteres water environment, it will cause corrosion of similar to hydrofluoric acid. It fully hydrolyzes into hydrofluoric acid and sulfur dioxide, the partial hydrolysis can produce toxic thionyl fluoride, alkali solution can fully absorb into it and turn it into non-toxic salts; it is soluble in benzene.
Sulfur tetrafluoride (abbreviation of SF4) is currently widely used and it is the most potent selective organic fluorinating agent, it can selectively fluorinate carbonyl and hydroxyl (substituted oxygen of carbonyl compounds); it is widely used in chemical high-grade and high-end liquid crystal material medicine, pesticide intermediates production industry, it has irreplaceable position.
The above information is edited by the lookchem of Wang Xiaodong.
Category
Harmful gases.
Toxicity
Mid toxicity.
Acute toxicity
Inhalation-rat LCL0: 19 PPM/4h.
Flammability hazard characteristics
It can decompose into toxic hydrogen fluoride and sulfur dioxide gas when meets water.
Storage characteristics
Treasury ventilation low-temperature drying; it should be stored separately with acids, flammable, explosive materials.
Chemical Properties
Different sources of media describe the Chemical Properties of 7783-60-0 differently. You can refer to the following data:
1. A gas. Decomposes
in water. Noncombustible.
2. Sulfur tetrafluoride is a colorless gas with an odor like sulfur dioxide. Shipped as a liquefied compressed gas.
Uses
Different sources of media describe the Uses of 7783-60-0 differently. You can refer to the following data:
1. Compounds of interest in this group include sulfur hexafluoride (SF6) used as an electrical insulating material in circuit breakers, cables, capacitors, and transformers, and its degradation products, which are produced when electrical arcing occurs. The specific compounds produced depend on the arcing conditions. In anaerobic and anhydrous circumstances, sulfur tetrafluoride (SF4) is produced; if moisture is present, the tetrafluoride may hydrolyze to form thionyl fluoride (SOF2) and HF. Sulfuryl fluoride (SO2F2), disulfur decafluoride (S2F10), sulfur pentafluoride (SF5), and sulfur dioxide are also formed from sulfur hexafluoride. Some of these compounds are also produced as contaminants in the commercial production of sulfur hexafluoride by burning sulfur in fluorine gas, for example, sulfur tetrafluoride and disulfur decafluoride, as well as sulfur monofluoride (S2F2).
2. As a fluorinating agent in
the production of water- and oil-repellant
materials and lubricity improvers; found as a
degradation product of sulfur hexafluoride.
3. Selective fluorinating agent.
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.
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.
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 [Lewis, 3rd ed., 1993, p. 1197]. Explosively violent reactions with 2-(hydroxymethyl)furan or 2-methyl-3-butyn-2-ol even below -50° C have been recorded [Bretherick, 5th ed., 1995, p. 1432]. Ignition or explosion may occur on contact with dioxygen difluoride even below -100° C [Streng, A. G., Chem. Rev., 1963, 63, p. 615].
Hazard
High by inhalation, strong irritant to eyes,
mucous membranes, and upper respiratory tract irritant.
Lung damage.
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.
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.
Safety Profile
Poison by inhalation. A powerful irritant. Will react with water, steam, or acids to yield toxic and corrosive fumes. Incompatible with dioxygen difluoride. When heated to decomposition it emits very toxic fumes of Fand SOx. See also FLUORIDES.
Potential Exposure
Sulfur tetrafluoride is used as a selective fluorinating agent in making water-repellent and oil
repellent materials and lubricity improvers. It is also used as a pesticide intermediate.
Shipping
UN2418 Sulfur tetrafluoride, Hazard Class: 2.3; Labels: 2.3-Poisonous gas, 8-Corrosive material, Inhalation Hazard Zone A. Cylinders must be transported in a secure upright position, in a well-ventilated truck. Protect cylinder and labels from physical damage. The owner of the compressed gas cylinder is the only entity allowed by federal law (49CFR) to transport and refill them. It is a violation of transportation regulations to refill compressed gas cylinders without the express written permission of the owner. Forbidden to be transported by any aircraft or by rail tank car.
Incompatibilities
Keep away from moisture, concentrated sulfuric acid, dioxygen difluoride. Reacts vigorously with water, alcohols and acids releasing toxic fluoride, sulfur oxide fumes and forming a corrosive acid solution. Readily hydrolyzed by moisture, forming hydrofluoric acid, thionyl fluoride. Attacks glass, ceramic, concrete
Waste Disposal
Return refillable compressed gas cylinders to supplier. Nonrefillable cylinders should be disposed of in accordance with local, state and federal regulations. Allow remaining gas to vent slowly into atmosphere in an unconfined area or exhaust hood. Refillabletype cylinders should be returned to original supplier with any valve caps and outlet plugs secured and valve protection caps in place.
Check Digit Verification of cas no
The CAS Registry Mumber 7783-60-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 3 respectively; the second part has 2 digits, 6 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 7783-60:
(6*7)+(5*7)+(4*8)+(3*3)+(2*6)+(1*0)=130
130 % 10 = 0
So 7783-60-0 is a valid CAS Registry Number.
InChI:InChI=1/F4S/c1-5(2,3)4
7783-60-0Relevant articles and documents
TEA CO 2 laser-induced isotopically selective dissociation of SF 6 in a cold shock wave
Makarov,Petin
, p. 345 - 350 (2000)
When a pulsed gas dynamically cooled supersonic molecular flow interacts with solid surface a cold shock wave is formed in front of it, non-equilibrium conditions in which may be 'reverse' to those in the incident (unperturbed) flow. Isotopically selective infrared multiphoton dissociation of SF6 in the cold shock wave was studied. Anomalously a large increase (more than one order of magnitude) of the yield of products was found, as compared with the case of excitation of SF6 in unperturbed flow, without essential decrease of the selectivity of process.
Pentafluoronitrosulfane, SF5NO2
Lu, Norman,Thrasher, Joseph S.,Von Ahsen, Stefan,Willner, Helge,Hnyk, Drahomir,Oberhammer, Heinz
, p. 1783 - 1788 (2008/10/09)
The synthesis of pentafluoronitrosulfane, SF5NO2, is accomplished either by reacting N(SF5)3 with NO 2 or by the photolysis of a SF5Br/NO2 mixture using diazo lamps. The product is purified by treatment with CsF and repeated trap-to-trap condensation. The solid compound melts at -78°C, and the extrapolated boiling point is 9°C. SF5NO2 is characterized by 19F, 15N NMR, IR, Raman, and UV spectroscopy as well as by mass spectrometry. The molecular structure of SF 5NO2 is determined by gas electron diffraction. The molecule possesses C2v symmetry with the NO2 group staggering the equatorial S-F bonds and an extremely long 1.903(7) A S-N bond. Calculated bond enthalpies depend strongly on the computational method: 159 (MP2/6-311G++(3df)) and 87 kJ mol-1 (B3LYP/6-311++G-(3df)). The experimental geometry and vibrational spectrum are reproduced reasonably well by quantum chemical calculations.
Spectrum and Mutual Kinetics of HOCH2CH2O2 Radicals
Anastasi, C.,Muir, D. J.,Simpson V. J.
, p. 5791 - 5797 (2007/10/02)
β-Hydroxyethyl peroxy radicals have been studied by using pulse radiolysis to generate the radicals and kinetic absorption to monitor their formation and decay.The ultraviolet absorption spectrum assigned to HOCH2CH2O2 is broadband in nature with a maximum absorption cross section of 3.5 (+/-0.6) * 10-18 cm2 molecule-1 at 230 nm.An overall rate constant for the self-reaction 2 HOCH2CH2O2 -> HOCH2CH2OH + HOCH2CHO + O2 (3a), 2 HOCH2CH2O2 -> 2 HOCH2CH2O + O2 (3b) of k3 = 7.7 (+/-1.2) * 10-12 cm3 molecule-1 s-1 was measured at room temperature together with an estimation of the branching ratio, k3a/k3 = 0.75 (+/-0.1).
