CAS No.2551-62-4,Sulfur hexafluoride Suppliers,MSDS download

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Basic Information

Molecular Structure:
CAS No.:	2551-62-4
Name:	Sulfur hexafluoride
Article Data:	132

Formula:	S F₆
Molecular Weight:	146.056
Synonyms:	Sulfur fluoride (SF6), (OC-6-11)-;Sulfur fluoride, (OC-6-11)-;Sulfur fluoride;Hexafluorosulfur;Hexafluorure de soufre;SonoVue;Sulphur hexafluoride;
EINECS:	219-854-2
Density:	6.602
Melting Point:	?50°C(lit.)
Boiling Point:	-64 °C (subl.)
Solubility:	slightly in water
Appearance:	colourless odourless gas
Hazard Symbols:	Xi
Risk Codes:	37
Safety:	38
Transport Information:	UN 1080
PSA:	25.30000
LogP:	3.16940

Synthetic route

: xenon fluoride

: 80485-40-1
dithionitronium hexafluoroarsenate

A: 88446-29-1
bis(difluorothio)nitronium hexafluoroarsenate(V)

B: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
With fluorosulfonyl fluoride In not given XeF2 was condensed onto a frozen mixure of S2NAsF6 and SO2F2, mixt. wasstirred and shaken for 0.5 h at 0°C, mixt. was stirred at room temp. for 12h; volatiles were removed, product was dissolved in SO2, than SO2 was removed , product was recrystd. from SO2-SO2ClF; elem. anal.;	A 99% B <1

...Expand

: 7664-39-3
hydrogen fluoride

: 7446-09-5
sulfur dioxide

A: 640723-20-2, 2699-79-8, 12769-73-2
fluorosulfonyl fluoride

B: 173009-97-7, 118492-84-5, 13709-54-1
thionyl tetrafluoride

C: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
In hydrogen fluoride byproducts: OF2; Electrolysis; 16°C, 6-8 Volt,;	A 90.4% B n/a C n/a
In hydrogen fluoride byproducts: OF2; aq. HF; Electrolysis; 16°C, 6-8 Volt,;	A 90.4% B n/a C n/a

...Expand

: 7782-41-4
fluorine

: 7704-34-9
sulfur

: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
In further solvent(s) fluorination (N2 carrier gas (ratio F/N2 1:5), 0 to -5°C, als solvent freon-11); low temp. fractional condensation; IR spectroscopy;	90%

: 74542-21-5
pentafluoro(fluorochloroamido)sulfur

A: 74542-22-6
(fluoroamido)pentafluorosulfur

B: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
With Hg; CF3COOH In neat (no solvent) byproducts: ClHgOC(O)CF3; mixt. warmed in a reactor from -196°C to 0°C and stirred for 5 h; pumped through traps at -78, -110 and -196°C;	A 90% B n/a

: 7782-41-4
fluorine

: 7704-34-9
sulfur

A: 5714-22-7
disulfur decafluoride

B: 13709-35-8
disulfur difluoride

C: 7783-60-0
sulfur tetrafluoride

D: 7664-39-3
hydrogen fluoride

E: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
In neat (no solvent) byproducts: OF2; introduction of F2 into steel chamber, sulfur in compartments; detailed description of apparatus and handling given;; first passing through Ni (or Monel) tube (400°C); second Cu column (H2O sprayed); passed into steel column (containing carbon/Fe shavings; aq. NaOH sprayed); dried in column (containing solid NaOH, BaO or P2O5);;	A n/a B n/a C n/a D n/a E 87%

...Expand

: 74542-22-6
(fluoroamido)pentafluorosulfur

: 74542-20-4
(fluoroimido)tetrafluorosulfur

B: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
With KF In neat (no solvent) byproducts: OSF2, CF3C(O)F, KF*HF; SF5NHF was condensed to the reactor with KF at -196°C, the reactor was held at 0°C for 7 h; pumped through traps at -110, -125 and -196°C;	A 85% B n/a

: 15930-75-3
thiazyl trifluoride

: 7790-89-8
chlorine monofluoride

: 7782-41-4
fluorine

A: 79593-52-5
(SF4NCl)2

B: 74542-21-5
pentafluoro(fluorochloroamido)sulfur

C: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
In neat (no solvent) The reactor with SF3N and ClF was warmed from -196°C to -78°C over 14 h; addn. of F2, warming; pumped through traps at -78, -115, and -196°C;	A n/a B 75% C n/a

...Expand

: 7446-09-5
sulfur dioxide

: 7782-41-4
fluorine

A: 640723-20-2, 2699-79-8, 12769-73-2
fluorosulfonyl fluoride

B: 80937-33-3
oxygen

C: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
In neat (no solvent) heating in cooled copper tube (water) to 650°C; description of apparatus given;; condensed (liquid O2); passed through flasks containing H2O and hot aq. KOH; dried over P2O5;;	A n/a B n/a C 70%

...Expand

: 10036-47-2
tetrafluorohydrazine

: 354-67-6
pentafluoro(1,1,2,2,2-pentafluoroethyl)-λ6-sulfane

A: 75-73-0
carbon tetrafluoride

B: 76-16-4
Hexafluoroethane

C: 354-80-3
Perfluoroethylamine

D: 7783-60-0
sulfur tetrafluoride

E: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
NF3 formed too;	A n/a B n/a C 70% D n/a E n/a
NF3 formed too;	A n/a B n/a C 70% D n/a E n/a

...Expand

: 15930-75-3
thiazyl trifluoride

: 7782-41-4
fluorine

A: 81625-46-9
F5SNSF4

B: 2551-62-4
sulfur(VI) hexafluoride

Conditions

Conditions	Yield
byproducts: N2; from -78 to 20°C;	A 50% B n/a

...Expand

Raw Materials

812-12-4

Downstream Products

372-64-5

75-15-0

124-38-9

76-16-4

7783-06-4

10097-32-2

7783-41-7

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Chemistry

Molecular Formula: SF₆
Molecular Weight: 146.05 g/mol
Canonical SMILES: S(F)(F)(F)(F)(F)F
InChI: InChI=1/F6S/c1-7(2,3,4,5)6
EINECS: 219-854-2
Classification Code: Diagnostic [ultrasound]
Product Categories: Inorganics; Inorganic Fluorides; Vitamin Ingredients; Chemical Synthesis; Compressed and Liquefied Gases; Synthetic Reagents
Stability: Stable. Non-flammable. Explodes on contact with disilane. Reacts with sodium.
XLogP3-AA: 4.2
H-Bond Acceptor: 6
Exact Mass: 145.96249
MonoIsotopic Mass: 145.96249
Heavy Atom Count: 7
Complexity: 62.7
Melting Point: -50 °C(lit.)
Density: 6.602 g/cm³
Boiling Point: -64 °C (lit.)
Vapor density: 5.11 (vs air)
Vapor pressure: 22 mm Hg ( 21.1 °C)
Water Solubility of Sulfur hexafluoride (CAS NO.2551-62-4): slightly

Uses

Sulfur hexafluoride (CAS NO.2551-62-4) is used in the electrical industry as a gaseous dielectric medium for high-voltage (35 kV and above) circuit breakers, switchgear, and other electrical equipment, often replacing oil filled circuit breakers (OCBs) that can contain harmful PCBs and used in the semiconductor industry as an etchant. Sulfur hexafluoride is also used as a reagent for creating thrust in a closed Rankine cycle propulsion system, reacting with solid lithium as used in the United States Navy's Mark 50 torpedo and used as an alternative to oil in insulating high voltage equipment such as power transformers and switchgear and used to pressurize the waveguide in radar systems. The magnesium industry uses large amounts of SF6 as inert gas to fill casting forms.

Production

SF₆ can be prepared from the elements through exposure of S₈ to F₂. This is also the method used by the discoverers Henri Moissan and Paul Lebeau in 1901. Some other sulfur fluorides are cogenerated, but these are removed by heating the mixture to disproportionate any S₂F₁₀ (which is highly toxic, unlike SF₆) and then scrubbing the product with NaOH to destroy remaining SF₄. There is virtually no reaction chemistry for SF₆. It does not react with molten sodium, but reacts exothermically with lithium. Starting from SF₄, one can prepare SF₅Cl, which is structurally related to SF₆. The monochloride is, however, a strong oxidant and readily hydrolyzed to sulfate.

Toxicity Data With Reference

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rabbit	LD50	intravenous	5790mg/kg (5790mg/kg)		Toxicology Letters. Vol. 1000(Sp)

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

This material is chemically inert in the pure state and is considered to be physiologically inert as well. However, as it is ordinarily obtainable, it can contain variable quantities of the low-sulfur fluorides. Some of these are toxic, very reactive chemically, and corrosive in nature. These materials can hydrolyze on contact with water to yield hydrogen fluoride, which is highly toxic and very corrosive. In high concentrations and when pure it may act as a simple asphyxiant. Incompatible with disilane. Vigorous reaction with disilane. May explode. When heated to decomposition emits highly toxic fumes of F⁻ and SO_x.
Hazard Codes: Xi
Risk Statements: 37
R37: Irritating to respiratory system
Safety Statements: 38
S38: In case of insufficient ventilation, wear suitable respiratory equipment.
RIDADR: UN 1080 2.2
Hazard Note: Irritant
HazardClass of Sulfur hexafluoride (CAS NO.2551-62-4): 2.2

Standards and Recommendations

OSHA PEL: TWA 1000 ppm
ACGIH TLV: TWA 1000 ppm
DFG MAK: 1000 ppm (6100 mg/m³)
DOT Classification: 2.2; Label: Nonflammable Gas

Specification

Sulfur hexafluoride (CAS NO.2551-62-4), its Synonyms are Sulfur fluoride (SF6), (OC-6-11)- ; Sulfur fluoride, (OC-6-11)- ; Sulfur fluoride ; Hexafluorosulfur ; Hexafluorure de soufre ; SonoVue ; Sulphur hexafluoride . It is colourless odourless gas.