Schwefelhexafluorid
SF6 · SULPHUR HEXAFLUORIDE · sulfur hexafluoride gas · OC-6-11 · sulfur hexafluoride cyl. with 4.75 kg (~net) · Elegas · Esaflon · SULFURHEXAFLORIDE
Identifikatoren & physikalische Daten
| CAS No. | 2551-62-4 |
|---|---|
| Summenformel | F6S |
| Durchschnittliche Molmasse | 146,06 g/mol |
| Monoisotopische Masse | 145,96249032 g/mol |
| SMILES | FS(F)(F)(F)(F)F |
| InChIKey | SFZCNBIFKDRMGX-UHFFFAOYSA-N |
| PubChem CID | 17358 |
| ChEMBL | CHEMBL1796998 |
| ChEBI | CHEBI:30496 |
| EC No. | 219-854-2 |
| DTXSID | DTXSID8029656 |
| Lokaler Name | Schwefelhexafluorid |
Chemische & physikalische Eigenschaften
| XLogP | 4,2 |
|---|---|
| Polarare Oberfläche (TPSA) | 1 |
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 6 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 7 |
| Formalladung | 0 |
| Komplexität | 62,7 |
| Stoffklassen | Toxic Gases & Vapors -> Simple Asphyxiants |
| Arzneimittel | Pharmaceuticals -> Various |
| SpringerMaterials Properties | phonon wavenumber |
| LogP (Verteilungskoeffizient) | log Kow = 1.68 |
| Geruch | Odorless |
| Geschmack | Tasteless |
| Dichte | 6.5 g/L (gas)1.67 (liquid)Inert to nucleophilic attackdoes not attack glassone of heaviest known gasesdensity approx 5 times that of airno fluorine exchange with anhydrous hydrogen fluorideunchanged at 500 °C. .. thermodynamically unstable, but kinetically stable gas ... stable to silent electrical dischargeSpecific volume: 2.5 cu ft/lb at 21.1 °C. Freezing point = -64 °C (sublimes)density, gas = 6.5 g/Ldensity, liquid = 1.67 g/LCritical density: 0.736 kg/cu dm.Triple point = -49.596 °Cdensity = 5.970 g/LRelative density (water = 1): 1.96.602 |
| Viscosity | Gas: 150.29 micropoise at 25 °Cliquid: 0.277 centipoise at 25 °C |
| Color/Form | Colorless gas [Note: Shipped as a liquefied compressed gas. Condenses directly to a solid upon cooling]. |
| Löslichkeit | 0.003 % at 77 °F (NIOSH, 2024)In water, 31 mg/L at 25 °CSolubility in water at 25 °C at partial pressure of 101.325 kPa = 5.4 cu cm/kg water.SOLUBLE IN POTASSIUM HYDROXIDE AND ALCOHOL0.297 mL dissolves in 1.0 mL transformer oil at 25 °C, 1 atmFor more Solubility (Complete) data for SULFUR HEXAFLUORIDE (6 total), please visit the HSDB record page.slightly soluble in H2Osoluble in ethanol |
| Human Drugs | Breast FeedingLactationMilk, HumanContrast MediaDiagnostic AgentsFluoridesGasesEMA approved medicines: Human medicine |
| Siedepunkt | Sublimes (NIOSH, 2024)-63.8 °C (sublimes)Sulfur hexafluoride is an unreactive substance. Sulfur hexafluoride is not attacked by water, acids, or bases, at room temperature. It is resistant to the action of carbon, copper or magnesium at red heat, and will not react with sodium below its boiling point. It reacts with sulfur vapor or hydrogen at 400 °C.−64 °C1 mm Hg(lit.) |
| Schmelzpunkt | −50 °C(lit.) |
| Dampfdichte | 5.11 (vs air) |
| Dampfdruck | 22 mm Hg ( 21.1 °C) |
| Aggregatzustand | colorless gas |
| Farbe | colorless |
| Geruch | odorless |
| Spezifische Wärmekapazität | Cp(gas): 0.66 J/(g·K), at 25℃ |
| Merck | 13,9063 |
| Henry-Konstante | 2.4×10-6 mol/(m3Pa) at 25℃, Warneck and Williams (2012) |
| Stabilität | Stable. Non-flammable. Explodes on contact with disilane. Reacts with sodium. |
| LogP (Verteilungskoeffizient) | 1.68 at 20℃ |
| CAS Datenbank | 2551-62-4(CAS DataBase Reference) |
| NIST chemische Informationen | Sulfur hexafluoride(2551-62-4) |
| EPA chemische Informationen | Sulfur hexafluoride (2551-62-4) |
Sicherheit & Vorschriften
| GHS-Einstufung | WarningH280 (100%): Contains gas under pressuremay explode if heated [Warning Gases under pressure]P261, P271, P304+P340, P319, P403+P233, P405, P410+P403, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 239 reports by companies from 8 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Not Classified |
|---|---|
| Regulatorische Informationen | Chemical: Sulfur fluoride (SF6)Sulfur fluoride (SF6), (OC-6-11)- is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Sulfur fluoride (SF6), (OC-6-11)- are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 11-04-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/13559Sulphur hexafluoride: Non hazardousThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.) |
| Weitere Sicherheitsinformationen | Evaluation - Chemicals that are unlikely to require further regulation to manage risks to human health |
| DOT-Kennzeichnung | Non-Flammable Gas |
| Brandgefahren | Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]:· Some may burn but none ignite readily.Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. |
| Brandpotenzial | Noncombustible |
| Gesundheitsgefahren | Excerpt from ERG Guide 126 [Gases - Compressed or Liquefied (Including Refrigerant Gases)]:· Vapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas. |
| Gefahrenübersicht | . . . it seems unlikely that a gas as inert as sulfur hexafluoride would exert any toxic effect in concentrations as low as 1000 ppm. The chief hazard, as with other inert gases, would seem to be asphyxiation as a result of the displacement of air by this heavy gas. [ACGIH] Possible frostbite from contact with liquid |
Anwendungen & Verwendung
Beschreibung
Sulfur hexafluoride is a colorless, odorless, nontoxic, nonflammable gas that has a high dielectric strength and serves widely as an insulating gas in electrical equipment. At atmospheric pressures it sublimes directly from the solid to the gas phase and does not have a stable liquid phase unless under a pressure of more than 32 psia (221 kPa, abs). It is shipped as a liquefied compressed gas at its vapor pressure of 298 psig at 70°F (2050 kPa at 21.1°C). One of the most chemically inert gases known, it is completely stable in the presence of most materials to temperatures of about 400°F (204°C) and has shown no breakdown or reaction in quartz at 900°F (482°C). Sulfur hexafluoride is slightly soluble in water and oil. No change in pH occurs when distilled water is saturated with sulfur hexafluoride.
Verwenden
Sulfur hexafluoride is used extensively as a gaseous dielectric in various kinds of electrical power equipment, such as switchgear, transformers, condensers, and circuit breakers. It has also been used as a dielectric at microwave frequencies and as an insulating medium for the power supplies of high-voltage machines. Sulfur hexafluoride is also gaining use in nonelectrical applications, including blanketing of molten magnesium, leak detection, and plasma etching in the semiconductor industry. Sulfur hexafluoride also has some limited medical applications.
Herstellung & Synthese
synthetische
Sulfur hexachloride may be prepared by reacting fluorine with sulfur or sulfur dioxide.