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pyridine

pyridine or azine , C ₅ H ₅ N, colorless, flammable, toxic liquid with a putrid odor. It melts at -42°C and boils at 115.5°C. Chemically, it is a heterocyclic aromatic tertiary amine (see under amino group ). Its molecule resembles that of benzene, one carbon-hydrogen unit in the benzene ring being replaced with a nitrogen molecule. It is miscible with water and with most organic solvents. Its aqueous solution is slightly alkaline. Pyridine is used as a solvent, as a denaturant for alcohol, and as a starting material in the synthesis of other compounds. Compounds that can be derived from pyridine include antihistamines and vitamins. Pyridine is obtained from bone oil or from coal tar by destructive distillation, which decomposes alkaloids that contain it. Alkaloids that contain pyridine include coniine, piperine (the alkaloid in pepper), and nicotine (present in tobacco); free pyridine is present in tobacco smoke.

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	Development trend of the pyridine market. (Special Report). Magazine article from: China Chemical Reporter; 12/6/2002; ; 700+ words ; Pyridine and its derivatives include pyridine, 2-methyl pyridine, 3-methyl pyridine, 4-methyl pyridine and 2-methyl-5-pyridine. Pyridine compounds are first extracted from coal tar. With the demand increase in the economic growth and the development... Read more
	Methyl pyridine market. (Market Report).(Brief Article) Magazine article from: China Chemical Reporter; 10/6/2002; 262 words ; Methyl pyridine includes 3 varieties of 2-methyl pyridine, 3-methyl pyridine and 4-methyl pyridine. It is mainly used in the synthesis of intermediates for various fine chemicals such as pesticides, pharmaceuticals and rubber assistants. There... Read more
	Demand for pyridine compounds increases steadily.(Fine and Specialty) Magazine article from: China Chemical Reporter; 3/16/2009; ; 699 words ; Pyridine compounds are mainly used to produce the herbicides paraquat...imperative for development in China. Rapid capacity expansion Pyridine compounds and downstream products have developed rapidly...300 tons in 2007, an increase of 36.9% over 2006. Major pyridine compound producers in China include ... Read more
	2-vinyl pyridine process wins invention patent.(INNOVATION) Magazine article from: China Chemical Reporter; 10/6/2007; 65 words ; ...Ltd. has successfully developed the 2-vinyl pyridine production process and won the invention patent of the state. 2-vinyl pyridine is mainly used to produce styrene--butadiene...commercial production capacity of 500 t/a 2-vinyl pyridine today. Read more
	Reilly pyridine unit doubles capacity.(NEWSDESK: From oversea)(Nantong Reilly Chemical Co)(Brief Article) Magazine article from: China Chemical Reporter; 5/26/2005; 258 words ; Nantong Reilly Chemical Co., Ltd. has completed the first phase of its pyridine production unit. The total capacity of pyridine and trimethyl pyridine has increased from 11 000 t/a in the original design to more than 16 000 t/a, over-fulfilli... Read more
	11 000 T/A Synthetic Pyridine Unit Put on Stream in Nantong.(Brief Article) Magazine article from: China Chemical Reporter; 4/26/2001; 132 words ; The synthetic pyridine unit of Nantong Rilly Chemical Co., Ltd. jointly...It indicates that the history of no synthetic pyridine production in China has ended. The 11 000 t/a synthetic pyridine unit has a total investment of 31 million U... Read more
	Rayon to increase synthetic pyridine prices.(Nantong Rayon Chemical Co Ltd)(Brief Article) Magazine article from: China Chemical Reporter; 12/26/2004; 53 words ; Nantong Rayon Chemical Co Ltd will increase the price of its synthetic pyridine produced in China by 10% from January 1st, 2005, due to the high prices...in 2005. Nantong Rayon Chemical Co Ltd is a leading manufacturer of pyridine in China. Read more
	Shift of major consumption sectors for trimethylpyridine.(Nanjing Redsun Group ) Magazine article from: China Chemical Reporter; 4/16/2005; 396 words ; ...today. One is the unit of 11 000 t/a pyridine and downstream products jointly constructed...a. The other is the 8 000 t/a unit of pyridine and downstream products in Nanjing Redsun...to construct a 30 000 t/a project of pyridine and downstream pesticides. There will... Read more
	Nicotinic acid / nicotinamide consumption to be widen.(Pharmaceuticals) Magazine article from: China Chemical Reporter; 10/26/2004; 700+ words ; The chemical name of nicotinic acid is pyridine-3-carboxylic acid. The different blends with nicotinamide are...duck, beef and mutton. The chemical name of nicotinamide is 3-pyridine formamide. Nicotinamide is one of the components in coenzyme... Read more
	Redsun launches herbicide base in Nanjing. (Project News). Magazine article from: China Chemical Reporter; 10/26/2002; 435 words ; ...million. The program includes an 8 000 t/a pyridine project and a 5 000 t/a paraquat project...Redsun Group succeeded in developing pyridine and its derivatives, important intermediates...in the following projects: 30 000 t/a pyridine and pyridine-related product, 10 000... Read more

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Related entries from encyclopedias, dictionaries, and thesauruses

	pyridine nucleotides Book article from: A Dictionary of Food and Nutrition pyridine nucleotides Obsolete name for the coenzymes NAD and NADP. Read more
	py Book article from: The Oxford Dictionary of Abbreviations py Chem. pyridine (used in formulae) Read more
	azine Book article from: The Columbia Encyclopedia, Sixth Edition , IUPAC name for pyridine . Read more
	denatured alcohol Book article from: A Dictionary of Food and Nutrition denatured alcohol The addition of dyestuffs and unpleasant flavours (such as pyridine) to prevent the consumption of alcohol which is intended for domestic or industrial purposes; up to 5% (toxic) methyl alcohol is added. Read more
	ECAPO Book article from: The Oxford Dictionary of Abbreviations ECAPO (ɪˈkɑːpəʊ) Chem. ethoxy carbonyl amino pyridine N-oxide Read more

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