Disulfur decafluoride

Disulfur decafluoride
Ball-and-stick 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
CAS Number	5714-22-7;
3D model (JSmol)	Interactive image;
ChemSpider	56348;
ECHA InfoCard	100.024.732
EC Number	227-204-4;
MeSH	Disulfur+decafluoride
PubChem CID	62586;
RTECS number	WS4480000;
UNII	5XG19I842O;
UN number	3287
CompTox Dashboard (EPA)	DTXSID2073356 ;
	InChI InChI=1S/F10S2/c1-11(2,3,4,5)12(6,7,8,9)10 Key: BPFZRKQDXVZTFD-UHFFFAOYSA-N;
	SMILES FS(F)(F)(F)(F)S(F)(F)(F)(F)F;
Properties
Chemical formula	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)
Solubility in water	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

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.

[PGCH-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.

[1]

[2]

[3]

[4]

[5]