Properties: Orthorhombic pyramidal, solvated crystals containing one mol benzene, mp 78.2°, dries on exposure to air. When dry, mp 93.4° (stable form; there are 2 metastable forms). d4100 1.0134; bp760 360°; bp200 239.7°; bp100 228°; bp60 221°; bp40 215.5°; bp20 206.8°; bp10 197°; bp5 188°; bp1.0 170°. nD100 1.59546. Absorption spectrum: Orndorff, J. Am. Chem. Soc.
49, 1543 (1927); Anderson, ibid.
50, 209 (1928);
51, 1890 (1929). Very sol in ether, hot alcohol, chloroform. Sol in petr ether, benzene, CS2. Slightly sol in glacial acetic acid. Soly (parts/100 parts satd soln (w/w) at 30°) 48.6 in chloroform; 12.5 in hexane; 53 in CS2; 7.24 parts in benzene (19°).
Melting point: mp 78.2°; mp 93.4°
Boiling point: bp760 360°; bp200 239.7°; bp100 228°; bp60 221°; bp40 215.5°; bp20 206.8°; bp10 197°; bp5 188°; bp1.0 170°
Index of refraction: nD100 1.59546
Density: d4100 1.0134
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