Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

nicotine




structure of the nicotine molecule
An alkaloid occurring in tobacco leaves and extracted from tobacco refuse; it is a colorless, oily liquid. Nicotine is used as an insecticide and to make niacin (nicotinic acid). It is one of the most toxic substances known; even the small doses ingested by smoking causes blood-vessel constriction, raised blood pressure, nausea, headache, and impaired digestion.


Related category

   • BIOCHEMISTRY