Selenium Oxychloride
Title: Selenium Oxychloride
CAS Registry Number: 7791-23-3
CAS Name: Seleninyl chloride
Molecular Formula: Cl2OSe
Molecular Weight: 165.87
Percent Composition: Cl 42.75%, O 9.65%, Se 47.60%
Line Formula: SeOCl2
Literature References: Prepd by passing chlorine into SeO2 suspended in carbon tetrachloride: Lenher, J. Am. Chem. Soc. 42, 2498 (1920); Hönigschmid, Görnhardt, Z. Naturforsch. 1, 661 (1946); by dehydration of dichloroselenious acid: Smith, Jackson, Inorg. Synth. 3, 130 (1950); from SOCl2 and SeO2: Paetzold, Aurich, Z. Anorg. Allg. Chem. 315, 72 (1962); from AlCl3 and SeO2: Drago, Whitten, Inorg. Chem. 5, 677 (1966). Acute toxicity: C. G. Wilber, Clin. Toxicol. 17, 171 (1980).
Properties: Nearly colorless or yellowish, corrosive liquid; fumes in the air. d416 2.44. Solidif ~5°. bp 180°. nD20 1.651. Dec by water into HCl and selenious acid. Miscible with carbon tetrachloride, chloroform, carbon disulfide, benzene, toluene. It is an excellent solvent for many substances including metals. LD50 s.c. in rabbits: 7 mg/kg (Wilber).
Boiling point: bp 180°
Index of refraction: nD20 1.651
Density: d416 2.44
Toxicity data: LD50 s.c. in rabbits: 7 mg/kg (Wilber)
CAUTION: Strong irritant, vesicant. See Clinical Toxicology of Commercial Products, R. E. Gosselin et al., Eds. (Williams & Wilkins, Baltimore, 5th ed., 1984) Section II, p 129.

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