Dinicotinic acid
Names
Preferred IUPAC name
Pyridine-3,5-dicarboxylic acid
Other names
3,5-Pyridinedicarboxylic acid
Identifiers
131640
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard
100.007.177
EC Number
279307
UNII
InChI=1S/C7H5NO4/c9-6(10)4-1-5(7(11)12)3-8-2-4/h1-3H,(H,9,10)(H,11,12)
Key: MPFLRYZEEAQMLQ-UHFFFAOYSA-N
C1=C(C=NC=C1C(=O)O)C(=O)O
Properties
C 7 H 5 N O 4
Molar mass
167.120 g·mol−1
Structure[ 1]
monoclinic
P21 /c, No. 14
a = 9.702 Å, b = 11.153 Å, c = 6.587 Å
α = 90°, β = 107.80°, γ = 90°
4
Hazards
GHS labelling :
Warning
H315 , H319 , H335
P261 , P264 , P271 , P280 , P302+P352 , P304+P340 , P305+P351+P338 , P312 , P321 , P332+P313 , P337+P313 , P362 , P403+P233 , P405 , P501
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
Dinicotinic acid (pyridine-3,5-dicarboxylic acid ) is a heterocyclic organic compound, more precisely a heteroaromatic . It is one of many pyridinedicarboxylic acids and consists of a pyridine ring carrying to carboxy groups in the 3- and 5-positions.
Preparation and properties
Dinicotinic acid can be formed by heating pyridine-2,3,5,6-tetracarboxylic acid or carbodinicotinic acid (pyridine-2,3,5-tricarboxylic acid).[ 2] [ 3]
The acid is sparingly soluble in water and ether. Its melting point of 323 °C is the highest among pyridinedicarboxylic acids. Upon heating, it decarboxylates and decomposes to nicotinic acid :[ 4]
References
See also