Title: Mesitylene
CAS Registry Number: 108-67-8
CAS Name: 1,3,5-Trimethylbenzene
Additional Names: sym-trimethylbenzene
Molecular Formula: C9H12
Molecular Weight: 120.19
Percent Composition: C 89.94%, H 10.06%
Literature References: Occurs in coal tar and in petroleum crudes; prepd by dehydrating acetone with H2SO4: Adams, Hufferd, Org. Synth. 2, 41 (1922).
Properties: Liquid; peculiar odor. d420 0.8637. mp -44.8°. nD18 1.49541. bp760 164.7°; bp100 98.9°; bp20 61°; bp10 47.4°; bp1.0 9.6°. Practically insol in water (100 g H2O dissolve 0.002 g). Miscible with alcohol, ether, benzene.
Melting point: mp -44.8°
Boiling point: bp760 164.7°; bp100 98.9°; bp20 61°; bp10 47.4°; bp1.0 9.6°
Index of refraction: nD18 1.49541
Density: d420 0.8637
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin, nose, throat, respiratory system; bronchitis; hypochromic anemia, headache, drowsiness, fatigue, dizziness, nausea, incoordination; vomiting, confusion; aspiration of liquid may cause chemical pneumonia. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 320.

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