| Title:  Ethynylbenzene CAS Registry Number:  536-74-3 Additional Names:  Phenylacetylene Molecular Formula:  C8H6 Molecular Weight:  102.13 Percent Composition:  C 94.08%, H 5.92% Line Formula:  C6H5CºCH Literature References:  Prepd by dropping b-bromostyrene on molten potassium hydroxide and distilling:  Hessler, Org. Synth. 2, 67 (1922). Properties:  Liquid.  d420 0.9300.  mp -44.8°.  bp760 142.4°; bp90 75°; bp15 39°.  nD20 1.5489.  Insol in water; miscible with alcohol, ether, other organic solvents. Melting point:  mp -44.8° Boiling point:  bp760 142.4°; bp90 75°; bp15 39° Index of refraction:  nD20 1.5489 Density:  d420 0.9300  |