o-Nitrobiphenyl
Title: o-Nitrobiphenyl
CAS Registry Number: 86-00-0
CAS Name: 2-Nitro-1,1¢-biphenyl
Additional Names: o-nitrodiphenyl; ONB
Molecular Formula: C12H9NO2
Molecular Weight: 199.21
Percent Composition: C 72.35%, H 4.55%, N 7.03%, O 16.06%
Literature References: Prepn from diazotized o-nitroaniline and benzene by a modified Gomberg reaction: Elks et al., J. Chem. Soc. 1940, 1284. Prepd industrially by direct nitration of biphenyl (yields ~50% para, 35% ortho).
Properties: Orthorhombic bipyramidal plates from ethanol. Characteristic sweetish odor. mp 36.7°. d425 1.44. d4015.5 (liq) 1.189. The technical liq weighs ~10 lbs/gal. bp760 325°; bp30 205°; bp13 170°; bp4 166°. nD25 (tech liq) 1.613. Flash pt 179°C (354°F). uv max: 325 nm. Dipole moment: 3.79. Viscosity of tech liquid (cP): 12 (45°); 38 (25°). Insol in water. Sol in methanol, ethanol, tetrahydrofurfuryl alcohol, acetone, DMF, carbon tetrachloride, perchlorethylene, mineral spirits, turpentine, glacial acetic acid.
Melting point: mp 36.7°
Boiling point: bp760 325°; bp30 205°; bp13 170°; bp4 166°
Flash point: Flash pt 179°C (354°F)
Index of refraction: nD25 (tech liq) 1.613
Absorption maximum: uv max: 325 nm
Density: d425 1.44; d4015.5 (liq) 1.189
Use: Plasticizer for resins, cellulose acetate and nitrate, polystyrenes; fungicide for textiles; wood preservative; dye intermediate.

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