Antimony Trichloride
Structural Formula Vector Image
Title: Antimony Trichloride
CAS Registry Number: 10025-91-9
CAS Name: Trichlorostibine
Additional Names: Butter of antimony
Molecular Formula: Cl3Sb
Molecular Weight: 228.12
Percent Composition: Cl 46.62%, Sb 53.38%
Line Formula: SbCl3
Literature References: Prepd from the elements: Hensgen, Rec. Trav. Chim. 9, 301 (1890); Kendall et al., J. Am. Chem. Soc. 45, 967 (1923); Schenk in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1963) p 608. Purification: Werner, Z. Anorg. Allg. Chem. 181, 154 (1929); Schaafsma, US 2324240 (1943 to Shell).
Properties: Orthorhombic, deliquesc needles from carbon disulfide or by sublimation at 100°. Fumes in air. Poisonous! d420 3.14. mp 73°. bp 223.5°; bp70 143.5°; bp11 102°. Cryoscopic constant: 18.4. Heat of fusion at 73.2°: 13.29 cal/g. Specific heat at 33°: 0.110 cal/g/°C. Dipole moment: 3.12 at 25° in CS2. One gram dissolves in 10.1 ml H2O at 25°. Gradual hydrolysis to SbOCl. Considerably more sol in dil HCl. Sol in alcohol, benzene, carbon disulfide, dioxane, chloroform (about 22%), ether, acetone, carbon tetrachloride. A satd soln in carbon tetrachloride is about 1.1 molar. Insol in pyridine, quinoline, other organic bases.
Melting point: mp 73°
Boiling point: bp 223.5°; bp70 143.5°; bp11 102°
Density: d420 3.14
CAUTION: Irritant, corrosive to skin.
Use: As of antimony trichloride soln; also as reagent for chloral, aromatic hydrocarbons, and vitamin A. For mol wt determinations. In chemical microscopy for the identification of drugs (forms adducts and addition compds). Commercially as a mordant, in making other antimony salts, in organic syntheses, as catalyst.
Therap-Cat-Vet: Escharotic; dehorning agent (calves, goats).

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