I copied this from Science Madness. Credit to them.
Nicotine, C10H14N2. The pure alkaloid is a colourless oil, b.p. 246.1 °/
730-5 mm. It can be purified
through the crystalline zincichloride, B,ZnCl2,2HCl,H20, the regenerated
base being distilled under reduced pressure (20-40 mm.) in presence...