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Disulfur decafluoride

Disulfur decafluoride
Names Preferred IUPAC name
Disulfur decafluoride
Systematic IUPAC name
Decafluoro-1𝜆,2𝜆-disulfane
Other names
  • Sulfur pentafluoride
  • TL-70
  • Agent Z
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard100.024.732EC Number
  • 227-204-4
MeSHDisulfur+decafluoride
RTECS number
  • WS4480000
UNII
UN number3287
  • 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 S2F10Molar mass254.10 g·mol Appearance colorless liquid Odorlike sulfur dioxideDensity2.08 g/cmMelting point−53 °C (−63 °F; 220 K) Boiling point30.17 °C (86.31 °F; 303.32 K) insoluble Vapor pressure561 mmHg (74.8 kPa) (20 °C (68 °F)) Hazards Occupational safety and health (OHS/OSH):
Main hazards
Poisonous NFPA 704 (fire diamond)
4
0
0
OX
Lethal dose or concentration (LD, LC):
  • 2000 mg/m (rat, 10 min)
  • 1000 mg/m (mouse, 10 min)
  • 4000 mg/m (rabbit, 10 min)
  • 4000 mg/m (guinea pig, 10 min)
  • 4000 mg/m (dog, 10 min)
NIOSH (US health exposure limits):
PEL (Permissible)
TWA 0.025 ppm (0.25 mg/m)
REL (Recommended)
C 0.01 ppm (0.1 mg/m)
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).

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).

It is a colorless liquid with a burnt match smell similar to sulfur dioxide.

Wikipedia source