Difference between revisions of "Pyridine"

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== Description ==
 
== Description ==
  
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A yellow liquid with a noxious odor. Pyridine was first prepared from coal-tar in 1846 by Anderson. Pyridine is used as a [http://cameo.mfa.org/materials/fullrecord.asp?name=solvent solvent] and it is one of the few solvents that can dissolve dried [http://cameo.mfa.org/materials/fullrecord.asp?name=linseed oil linseed oil] in paints and varnishes. It is used as a denaturant for [http://cameo.mfa.org/materials/fullrecord.asp?name=ethyl alcohol 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.
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A yellow liquid with a noxious odor. Pyridine was first prepared from coal-tar in 1846 by Anderson. Pyridine is used as a [[solvent|solvent]] and it is one of the few solvents that can dissolve dried [[linseed%20oil|linseed oil]] in paints and varnishes. It is used as a denaturant for [[ethyl%20alcohol|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.
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[[[SliderGallery rightalign|pyridine.jpg~Chemical structure]]]
 
== Synonyms and Related Terms ==
 
== Synonyms and Related Terms ==
  
 
azabenzene; azine
 
azabenzene; azine
  
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[[[SliderGallery rightalign|pyridine.jpg~Chemical structure]]]
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== Risks ==
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* Flammable.  Flash point = 68F. 
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* Dangerous fire risk. Combustion produces highly toxic cyanide gases.
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* Toxic by ingestion and inhalation. 
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* May be absorbed through the skin causing irritation.
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* ThermoFisher: [https://www.fishersci.com/store/msds?partNumber=AC290860025&productDescription=PYRIDINE%2C+FOR+ANALYSIS+2LT&vendorId=VN00032119&countryCode=US&language=en SDS]
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* EPA lists pyridine as hazardous waste due to its toxicity and ignitability; concentrations over 10% must be disposed of appropriately
  
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== Other Properties ==
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== Physical and Chemical Properties ==
  
 
Soluble in water, ethanol, ether, benzene, ligroin and fatty oils.
 
Soluble in water, ethanol, ether, benzene, ligroin and fatty oils.
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! scope="row"| Melting Point
 
! scope="row"| Melting Point
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| -42.0
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| -42.0 C
 
|-
 
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! scope="row"| Density
 
! scope="row"| Density
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| 0.987
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| 0.987 g/ml
 
|-
 
|-
 
! scope="row"| Molecular Weight
 
! scope="row"| Molecular Weight
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|-
 
|-
 
! scope="row"| Boiling Point
 
! scope="row"| Boiling Point
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| 115.5
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| 115.5 C
 
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|}
  
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== Hazards and Safety ==
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==Resources and Citations==
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Flammable.  Flash point = 68F.  Dangerous fire risk. Combustion produces highly toxic cyanide gases.
 
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Toxic by ingestion and inhalation.  May be absorbed through the skin causing irritation.
 
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LINK: [http://www.cdc.gov/niosh/ipcsneng/neng0323.html International Chemical Safety Card]
 
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== Authority ==
 
  
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* G.S.Brady, G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p.817
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* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971  Comment: p.817
  
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* Hermann Kuhn, Hermann Kuhn, ''Conservation and Restoration of Works of Art and Antiquities'', Butterworths, London, 1986
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* Hermann Kuhn, ''Conservation and Restoration of Works of Art and Antiquities'', Butterworths, London, 1986
  
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* George Savage, George Savage, ''Art and Antique Restorer's Handbook'', Rockliff Publishing Corp, London, 1954
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* 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
 
* ''The Merck Index'', Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996  Comment: entry 7869;  ref. index=1.5092

Latest revision as of 12:58, 17 April 2024

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.

Chemical structure

Pyridine.jpg

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

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