Isonicotinic acid

Isonicotinic acid^[1]

Names
IUPAC name Pyridine-4-carboxylic acid
Other names 4-Pyridinecarboxylic acid; p-Pyridinecarboxylic acid; 4-Picolinic acid
Identifiers
CAS Number	55-22-1
ChEBI	CHEBI:6032
ChEMBL	ChEMBL1203
ChemSpider	5709
Jmol interactive 3D	Image
KEGG	C07446
PubChem	5922
UNII	Y8SYN761TQ
InChI InChI=1S/C6H5NO2/c8-6(9)5-1-3-7-4-2-5/h1-4H,(H,8,9) Key: TWBYWOBDOCUKOW-UHFFFAOYSA-N InChI=1/C6H5NO2/c8-6(9)5-1-3-7-4-2-5/h1-4H,(H,8,9) Key: TWBYWOBDOCUKOW-UHFFFAOYAV
SMILES c1cnccc1C(=O)O
Properties
Chemical formula	C6H5NO2
Molar mass	123.11 g/mol
Appearance	White to off-white crystalline solid
Density	Solid
Melting point	310 °C (590 °F; 583 K) (sublimes)
Related compounds
Related compounds	nicotinic acid, pyridine
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Isonicotinic acid or 4-pyridinecarboxylic acid is an organic compound with the formula C₅H₄N(CO₂H). It is a derivative of pyridine with a carboxylic acid substituent at the 4-position. It is an isomer of picolinic acid and nicotinic acid which has the carboxyl group at the 2nd and 3rd position respectively compared to the 4-position for nicotinic acid.

Derivatives

Isonicotinic acids is a term loosely used for derivatives of isonicotinic acid. Examples include:

• Ethionamide
• Iproniazid
• Isoniazid
• Nialamide

• 

  Iproniazid

• 

  Nialamide

See also

• Nicotinic acids

References

1. Isonicotinic acid at chemicalland21.com

External links

• Isonicotinic Acids at the US National Library of Medicine Medical Subject Headings (MeSH)