Pyridine
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Description
A yellow liquid with a noxious odor. Pyridine was first prepared from coal-tar in 1846 by Anderson. Pyridine is used as a Solvent and it is one of the few solvents that can dissolve dried Linseed oil in paints and varnishes. It is used as a denaturant for ethanol to make it unfit for drinking. Pyridine has also been used as a chemical raw material for manufacturing many compounds and as a water repellent, bactericide, and herbicide.
Synonyms and Related Terms
azabenzene; azine
Risks
- Flammable. Flash point = 68F.
- Dangerous fire risk. Combustion produces highly toxic cyanide gases.
- Toxic by ingestion and inhalation.
- May be absorbed through the skin causing irritation.
- ThermoFisher: SDS
- EPA lists pyridine as hazardous waste due to its toxicity and ignitability; concentrations over 10% must be disposed of appropriately
Physical and Chemical Properties
Soluble in water, ethanol, ether, benzene, ligroin and fatty oils.
| Composition | N(CH)4CH |
|---|---|
| CAS | 110-86-1 |
| Melting Point | -42.0 C |
| Density | 0.987 g/ml |
| Molecular Weight | mol. wt.=79.11 |
| Refractive Index | 1.5092 |
| Boiling Point | 115.5 C |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p.817
- Hermann Kuhn, Conservation and Restoration of Works of Art and Antiquities, Butterworths, London, 1986
- George Savage, Art and Antique Restorer's Handbook, Rockliff Publishing Corp, London, 1954
- The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 7869; ref. index=1.5092
- CRC Handbook of Chemistry and Physics, Robert Weast (ed.), CRC Press, Boca Raton, Florida, v. 61, 1980 Comment: ref. index=1.507