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Related to pyridine: imidazole


A flammable, colorless or yellowish liquid base, C5H5N, having a penetrating odor and serving as the parent compound of many biologically important derivatives. It is used as a solvent and in the manufacture of various agricultural chemicals, rubber products, water repellents, dyes, and drugs.

py·rid′ic (pī-rĭd′ĭk) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Elements & Compounds) a colourless hygroscopic liquid with a characteristic odour. It is a basic heterocyclic compound containing one nitrogen atom and five carbon atoms in its molecules and is used as a solvent and in preparing other organic chemicals. Formula: C5H5N
[C19: from pyro- + -id3 + -ine2]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈpɪr ɪˌdin, -dɪn)

a colorless, flammable, liquid organic base, C5H5N, used chiefly as a solvent and in organic synthesis.
[1855; pyr- or pyr (role) + -idine]
py•rid•ic (paɪˈrɪd ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pyridine - a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal
alkali, base - any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides and hydroxides of metals and ammonia"
triphosphopyridine - a pyridine ring with three phosphorus groups
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References in periodicals archive ?
Fact.MR has announced the addition of the "Hydrogen Fluoride Pyridine Market Forecast, Trend Analysis & Competition Tracking - Global Review 2019 to 2029"report to their offering.
Summary: A new Cu(II) complex with bi-[N-(propionic acid)] terephthalal diacythydrazon (H4L) was obtained by the reaction of CuCl2*2H2O and H4L in 1:1 pyridine and methanol.
FDA is no longer allowing the use of synthetically derived benzophenone, ethyl acrylate, eugenyl methyl ether (methyl eugenol), myrcene, pulegone and pyridine. The agency determined data presented in a petition submitted by the Breast Cancer Fund, Center for Environmental Health, Center for Food Safety, Center for Science in the Public Interest, Consumers Union, Environmental Defense Fund, Environmental Working Group, Improving Kids' Environment, Natural Resources Defense Council, WE ACT for Environmental Justice and James Huff show these substances caused cancer in laboratory animals under the conditions of the studies.
And he avoided using paints with a substance called pyridine in it," Snyder said.
Therefore, we investigated the three-step carbamylation reaction of diethylene triamine (DA) with urea in pyridine, n-butanol, and pentanols and also using polar cosolvent additions to find an efficient synthesis procedure of D, aiming at one that can be scaled up for industrial production.
The main nitrogen compounds identified were anilines, pyridine and quinoline compounds.
The surface property measurements were carried out using Fourier-transform infrared (FTIR) spectroscopy with adsorbed pyridine. To obtain solid samples, the initial powders were mixed with barium fluoride, which is transparent around 1000 [cm.sup.-1] and does not distort the spectrum of the -OH groups when mixed at a ratio of 1 : 2.
Among polar solvents, pyridine (Py) has been generally used in the identification of organic binders in paints [22, 26, 27].
The pyridine derivatives were obtained in good yield using solvent and catalyst-free condition under the fusion condition.
We were working with a solvent known as pyridine and were supposed to observe and document the reactions with certain other chemicals.
Then, pyridine was dropped to dissolve, and the solution continued to reflux for 2 h.
The ligand 2, 6-bis (2-benzothiazolyl) pyridine [9, 10], has been shown to behave as an N-3 donor in its complexes with manganese (II), iron (II) and nickel (II).