4-(Pyridine-4-amido)benzoic acid CAS 5651-66-1
| CAS No. | 5651-66-1 |
| Molecular Formula | C13H10N2O3 |
| Molecular Weight | 242.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 4-(Pyridine-4-amido)benzoic acid (CAS 5651-66-1), a certified reference material (molecular formula C13H10N2O3, MW 242.23 g/mol) for analytical method development and quality control.
4-(Pyridine-4-amido)benzoic acid (C13H10N2O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C13H10N2O3 |
| Molecular Weight | 242.23 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
Related Pyridine Standards
- 2-[(Pyridine-3-carbonyl)-amino]-benzoic acid (CAS 6188-02-9)
- 4-(Pyridine-2-amido)benzoic acid (CAS 5693-36-7)
- Pyridine-2-carboxaldehyde 4-nitrophenylhydrazone (CAS 55537-30-9)
- Pyridine-2-carboxaldehyde 4-nitrophenylhydrazone (CAS 70421-66-8)
- Pyridine, 3-bromo-5-(cyclopentyloxy)- (CAS 422557-08-2)
- Pyridine, 2-bromo-5-fluoro-3-(trifluoromethyl)- (CAS 1807210-32-7)
- 3-(pyridine-3-carbonyl)-4H,5H,6H-cyclopenta[b]thiophen-2-amine (CAS 1803582-68-4)
- 3-(pyridine-4-carbonyl)-4H,5H,6H-cyclopenta[b]thiophen-2-amine (CAS 1803593-69-2)
Recommended Standards
- 4,4’-Dihydroxybenzil (CAS 33288-79-8)
- 4-(Nicotinamido)benzoic acid (CAS 5768-40-1)
- 4,4'-Dimethyl-[1,1'-bi(cyclohexane)]-3,3',6,6'-tetraene-2,2',5,5'-tetraone (CAS 4388-07-2)
- 4-(6-Hydroxybenzofuran-2-yl)benzene-1,3-diol (CAS 67736-22-5)
- 2-(tert-Butyl) 3a,6a-dimethyl dihydropyrrolo[3,4-c]pyrrole-2,3a,6a(1H,3H,4H)-tricarboxylate (CAS 1823864-72-7)
- 6-(Difluoromethyl)-4-methylnicotinonitrile (CAS 1806768-51-3)
- (Z)-[(4-Bromophenyl)[2-(4-chlorophenyl)cyclopropyl]methylidene]amino benzoate (CAS 338415-68-2)
- Riociguat Impurity N40 (CAS 428854-23-3)
- Methyl 1-methyl-2-oxo-1,2-dihydropyridine-4-carboxylate (CAS 20845-23-2)
- 2-Chloro-N-[4-(3-nitrophenyl)-1,3-thiazol-2-yl]-2-phenylacetamide (CAS 565191-94-8)
- Acetatodicarbonylruthenium,polymer (CAS 26317-70-4)
- tert-butyl 4-iodoazepane-1-carboxylate (CAS 1394839-99-6)
- Vonoprazan Impurity 268 (CAS CATO-C4X-1020268)
- Custom peptides (CAS CATO-CPTD788509)
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