Sulfuryl Fluoride

Title: Sulfuryl Fluoride
CAS Registry Number: 2699-79-8
Trademarks: Profume (Dow AgroSci.); Vikane (Dow AgroSci.)
Molecular Formula: F2O2S
Molecular Weight: 102.06
Percent Composition: F 37.23%, O 31.35%, S 31.42%
Line Formula: SO2F2
Literature References: Prepn: H. Moissan, P. Lebeau, C.R. Hebd. Seances Acad. Sci. 132, 374 (1901); M. Trautz, K. Ehrmann, J. Prakt. Chem. [2] 142, 79 (1935). Insecticidal properties and use as fumigant: E. E. Kenaga, US 2875127 (1959 to Dow). Review of prepn and properties: W. Kwasnik in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) pp 173-174; R. D. W. Kemmitt, D. W. A. Sharp, Adv. Fluorine Chem. 4, 225-227 (1965). Ion chromatographic determn in air: S. A. Bouyoucos et al., Am. Ind. Hyg. Assoc. J. 44, 57 (1983). Efficacy vs termite species during structural fumigation: N.-Y. Su, R. H. Scheffrahn, J. Econ. Entomol. 79, 903 (1986). Comparison with methyl bromide, q.v., of residue potential in packaged foods: R. H. Scheffrahn et al., Bull. Environ. Contam. Toxicol. 48, 821 (1992).
Properties: Odorless, colorless gas. Not very reactive. Stable to 400°. mp -135.82°. bp -55.38°. Vapor pressure (20°): 15.2 atm. Vapor density (20°): 4.3 g/l. Specific gravity (20°): 1.35. Soly at 16.5° (ml gaseous F2SO2/100 ml solvent): 4-5 (water); 24-27 (alcohol); 210-220 (toluene); 136-138 (CCl4). Not hydrolyzed by water. Hydrolyzed by NaOH solns. May be stored in compressed form in steel cylinders or in a gasometer over H2SO4.
Melting point: mp -135.82°
Boiling point: bp -55.38°
CAUTION: Potential symptoms of overexposure are conjunctivitis, rhinitis and pharyngitis; paresthesia; direct contact with liquid may cause frostbite. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 292.
Use: Fumigant insecticide; termiticide.
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