This latter base has been shown to be a hydrogen addition product of pyridine, C5H5N.
Indeed, Ladenberg has recently succeeded in obtaining benzol as an alteration product from pyridine, in certain reactions.
These fire-produced substances are called, from their origin, the 'pyridine series.'
When heated with concentrated sulphuric acid, it is oxidized to pyridine.
Bush concluded, therefore, that pyridine and not nicotine is the toxic factor in tobacco smoke.
As already stated, both series occur in coal-tar and the pyridine series also more abundantly in bone-oil.
When cinchonine is distilled with solid potassium hydrate, it yields pyrrol and bases of both the pyridine and quinoline series.
Reference will be made later on to the effects of nicotine and pyridine on the human system.
pyridine was, however, found in the smoke of all tobacco burned.
It gives a precipitate with iodine trichloride, and has therefore probably a pyridine nucleus, it may be an acid anilide.
pyridine pyr·i·dine (pĭr'ĭ-dēn')
A flammable, colorless or yellowish liquid base that results from the dry distillation of organic matter containing nitrogen, has a penetrating odor, and is used in analytical chemistry and in the manufacture of various drugs and vitamins.