Disulfur decafluoride

Disulfur decafluoride
Wireframe model of disulfur decafluoride
Ball-and-stick model of disulfur decafluoride
Ball-and-stick model of disulfur decafluoride
Space-filling model of disulfur decafluoride
Space-filling model of disulfur decafluoride
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)
ChemSpider
ECHA InfoCard 100.024.732 Edit this at Wikidata
EC Number
  • 227-204-4
MeSH Disulfur+decafluoride
RTECS number
  • WS4480000
UNII
UN number 3287
  • InChI=1S/F10S2/c1-11(2,3,4,5)12(6,7,8,9)10
    Key: BPFZRKQDXVZTFD-UHFFFAOYSA-N
  • FS(F)(F)(F)(F)S(F)(F)(F)(F)F
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
 Poisonous
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazard OX: Oxidizer. E.g. potassium perchlorate
4
0
0
OX
Lethal dose or concentration (LD, LC):
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)
 TWA 0.025 ppm (0.25 mg/m3)[1]
REL (Recommended)
 C 0.01 ppm (0.1 mg/m3)[1]
IDLH (Immediate danger)
 1 ppm[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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]

  1. ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0579". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ "Disulphur Decafluoride | 5714-22-7".
  3. ^ "Sulfur pentafluoride". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ 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.
  5. ^ 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.