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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 10366Generated: October 27, 2026

3,5-Pyridinedicarboxylic acid

PYRIDINE-3,5-DICARBOXYLIC ACID · 3,5-Pyridinedicarboxylate · DINICOTINIC ACID · NSC 6497 · AKOS 220-60 · inicotinicaci · 3, 5-pyridinic acid · Nicardipine USP RC D

https://huagongshe.com/en/chemical/10366

3,5-Pyridinedicarboxylic acid molecular structure

Identifiers & Physical Properties

CAS No.499-81-0
Molecular formulaC7H5NO4
Average molar mass167.12 g/mol
Monoisotopic mass167.02185764 g/mol
SMILESO=C(O)c1cncc(C(=O)O)c1
InChIKeyMPFLRYZEEAQMLQ-UHFFFAOYSA-N
PubChem CID10366
ChEMBLCHEMBL446761
ChEBICHEBI:46875
EC No.207-893-8
DTXSIDDTXSID10198149

Chemical & Physical Properties

XLogP-0.1
Topological polar surface area87.5
Hydrogen bond donors2
Hydrogen bond acceptors5
Rotatable bonds2
Heavy atoms12
Formal charge0
Complexity184
Melting point>300 °C (lit.)
Boiling point295.67°C (rough estimate)
Density1.5216 (rough estimate)
Refractive index1.6280 (estimate)
Storage conditionsSealed in dry,Room Temperature
Solubility1.0g/linsoluble
pKa (acidity coefficient)2.8(at 25℃)
Physical statePowder
ColorWhite to almost white
BRN131640
InChIInChI=1S/C7H5NO4/c9-6(10)4-1-5(7(11)12)3-8-2-4/h1-3H,(H,9,10)(H,11,12)
InChIKeyMPFLRYZEEAQMLQ-UHFFFAOYSA-N
SMILESC1=NC=C(C(O)=O)C=C1C(O)=O
CAS DataBase Reference499-81-0(CAS DataBase Reference)
FDA UNIIN5NMH4PZ3D
UNSPSC Code12352100
NACRESNA.22
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH315-H319-H335
GHS precautionary statementsP261-P264-P271-P280-P302+P352-P305+P351+P338
Target organsRespiratory system
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Hazard symbolsXi
Risk statements (R)36/37/38-20/21/22
Safety statements (S)26-36-24/25-36/37/39
UN transport number2811
Water hazard class (WGK)3
Hazard classIRRITANTEye Irrit. 2Skin Irrit. 2STOT SE 3
Customs code29333999
Storage class11 - Combustible Solids

Safety & Regulations

GHS classificationWarningH315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 50 reports by companies from 8 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Regulatory informationPyridine-3,5-dicarboxylic acid: Does not have an individual approval but may be used under an appropriate group standard
Hazard Classes and CategoriesSkin Irrit. 2 (100%)
Personal protective equipment (PPE)dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK)3
UN transport number2811
Customs code29333999
Risk statements (R)36/37/38-20/21/22
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXi
Safety statements (S)26-36-24/25-36/37/39
Hazard classIRRITANTEye Irrit. 2Skin Irrit. 2STOT SE 3
Storage class11 - Combustible Solids
Target organsRespiratory system
GHS hazard statementsH315-H319-H335
GHS precautionary statementsP261-P264-P271-P280-P302+P352-P305+P351+P338

Applications & Uses

Uses

3,5-Pyridinedicarboxylic Acid is a competitive inhibitor of butyrobetaine hydroxylase. It is also used as organic synthesis and pharmaceutical intermediates.