American Heritage® Dictionary of the English Language, Fourth Edition
- n. Any of three isomeric liquids, C5H4N(CH3), derived from coal tar, horse urine, and bone oil and used as an industrial solvent.
Century Dictionary and Cyclopedia
- n. Methylpyridine, C5H4-N.CH3, an oily basic liquid formed by the dry distillation of coal, and also made synthetically. There are three varieties,
α-, β-, and γ-picoline, which boil at 129°, 143.5°, and 142.5–144.5° C., respectively. Alpha-picoline is found in bone-oil. All three varieties have a strong odor resembling pyridine; they attack organic substances and are strong bases.
GNU Webster's 1913
- n. (Chem.) Any one of three isometric bases (C6H7N) related to pyridine, and obtained from bone oil, acrolein ammonia, and coal-tar naphtha, as colorless mobile liquids of strong odor; -- called also
- Latin pix, pic-, pitch + -ol1 + -ine2. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Besides his doctor's dissertation, about this period he published work on picoline and, in conjunction with Dobbie, on the decomposition products of the quinine alkaloids (1878-1879).”
“When nicotine vapor is passed through a red-hot tube, it yields essentially collidine, and, with this, some pyridine, picoline, lutidine, and gases such as hydrogen, marsh-gas, and ethylene.”
“Pyridine, picoline, lutidine, and collidine, the first four members of the pyridine series, have, moreover, all been formed synthetically, although the processes are not such as would yield the products as cheaply as they can be gotten from”
“In smoking, some of the nicotine is decomposed, forming pyridine, picoline, and other poisonous alkaloids.”
“In its synthesis 1,000 grammes of picoline were first converted into alphapicoline, 380 grammes being obtained.”
“Together, these projects provided a 35\% increase in capacity for beta picoline, a key raw material input used to produce 3-cyanopyridine and vitamin B3.”
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