Disulfur decafluoride
Disulfur decafluoride is a chemical compound with the formula S2F10. It was discovered in 1934 by Denbigh and Whytlaw-Gray. Each sulfur atom of the S2F10 molecule is octahedral, and surrounded by five fluorine atoms 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.
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| Names | |||
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| 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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SMILES
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| Properties | |||
| S2F10 | |||
| Molar mass | 254.10 g·mol−1 | ||
| Appearance | colorless liquid | ||
| Odor | like sulfur dioxide | ||
| 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 | |||
| Vapor pressure | 561 mmHg (20 °C) | ||
| Hazards | |||
| Occupational safety and health (OHS/OSH): | |||
Main hazards |
Poisonous | ||
| NFPA 704 (fire diamond) |
4
0
0 OX | ||
| Lethal dose or concentration (LD, LC): | |||
LC50 (median concentration) |
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) | ||
| NIOSH (US health exposure limits): | |||
PEL (Permissible) |
TWA 0.025 ppm (0.25 mg/m3) | ||
REL (Recommended) |
C 0.01 ppm (0.1 mg/m3) | ||
IDLH (Immediate danger) |
1 ppm | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |||
It is a colorless liquid with a burnt match smell similar to sulfur dioxide.
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