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manufacturer In shanghai.　 　　　  Pyridine is used as a precursor 
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although not synthesized from pyridine, contain its ring 
structure. They include B vitamins niacin and pyridoxal, the 
anti-tuberculosis drug isoniazid, nicotine and other 
nitrogen-containing plant products.Historically, pyridine was 
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gasification. However, increased demand for pyridine resulted in 
the development of more economical methods of synthesis from 
acetaldehyde and ammonia, and more than 20,000 tonnes per year 
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