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Disulfur decafluoride
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| Names | |||
|---|---|---|---|
| Preferred IUPAC name
Disulfur decafluoride | |||
| Systematic IUPAC name
Decafluoro-1λ6,2λ6-disulfane | |||
| Other names
Sulfur pentafluoride
TL-70 Agent Z | |||
| Identifiers | |||
3D model (JSmol)
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| ChemSpider | |||
| ECHA InfoCard | 100.024.732 | ||
| EC Number |
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| MeSH | Disulfur+decafluoride | ||
PubChem CID
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| RTECS number |
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| UNII | |||
| UN number | 3287 | ||
CompTox Dashboard (EPA)
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| Properties | |||
| S2F10 | |||
| Molar mass | 254.10 g·mol−1 | ||
| Appearance | colorless liquid | ||
| Odor | like sulfur dioxide[1] | ||
| Density | 2.08 g/cm3 | ||
| Melting point | −53 °C (−63 °F; 220 K) | ||
| Boiling point | 30.1691 °C (86.3044 °F; 303.3191 K) | ||
| insoluble[2] | |||
| Vapor pressure | 561 mmHg (20 °C)[1] | ||
| Hazards | |||
| Occupational safety and health (OHS/OSH): | |||
Main hazards
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Poisonous | ||
| NFPA 704 (fire diamond) | |||
| Lethal dose or concentration (LD, LC): | |||
LC50 (median concentration)
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2000 mg/m3 (rat, 10 min) 1000 mg/m3 (mouse, 10 min) 4000 mg/m3 (rabbit, 10 min) 4000 mg/m3 (guinea pig, 10 min) 4000 mg/m3 (dog, 10 min)[3] | ||
| NIOSH (US health exposure limits): | |||
PEL (Permissible)
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TWA 0.025 ppm (0.25 mg/m3)[1] | ||
REL (Recommended)
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C 0.01 ppm (0.1 mg/m3)[1] | ||
IDLH (Immediate danger)
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1 ppm[1] | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Disulfur decafluoride is a chemical compound with the formula S2F10. It was discovered in 1934 by Denbigh and Whytlaw-Gray.[4] Each sulfur atom of the S2F10 molecule is octahedral, and surrounded by five fluorine atoms[5] and one sulfur atom. The two sulfur atoms are connected by a single bond. In the S2F10 molecule, the oxidation state of each sulfur atoms is +5, but their valency is 6 (they are hexavalent). S2F10 is highly toxic, with toxicity four times that of phosgene.
It is a colorless liquid with a burnt match smell similar to sulfur dioxide.[1]
- ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0579". National Institute for Occupational Safety and Health (NIOSH).
- ^ "Disulphur Decafluoride | 5714-22-7".
- ^ "Sulfur pentafluoride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
- ^ Denbigh, K. G.; Whytlaw-Gray, R. (1934). "The Preparation and Properties of Disulphur Decafluoride". Journal of the Chemical Society. 1934: 1346–1352. doi:10.1039/JR9340001346.
- ^ Harvey, R. B.; Bauer, S. H. (June 1953). "An Electron Diffraction Study of Disulfur Decafluoride". Journal of the American Chemical Society. 75 (12): 2840–2846. doi:10.1021/ja01108a015.
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