4-Oxo-1,4-dihydro-1,6-naphthyridine-3-carboxylic acid CAS 4901-94-4
| CAS No. | 4901-94-4 |
| Molecular Formula | C9H6N2O3 |
| Molecular Weight | 190.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, 4-Oxo-1,4-dihydro-1,6-naphthyridine-3-carboxylic acid is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 190.16 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
4-Oxo-1,4-dihydro-1,6-naphthyridine-3-carboxylic acid (CAS 4901-94-4) is a high-purity analytical reference standard with the molecular formula C9H6N2O3 and a molecular weight of 190.16 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C9H6N2O3 |
| Molecular Weight | 190.16 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
Related Oxo Standards
- 6,7-dihydro-9H-pyrano[4,3-e][1,2,4]triazolo[1,5-a]pyrimidin-9-one (CAS 1000932-07-9)
- 5-oxo-5,6-dihydro-1,6-naphthyridine-2-carboxylic acid (CAS 1354555-25-1)
- 2-Oxo-1,2-dihydro-1,7-naphthyridine-3-carboxylic acid (CAS 1456507-52-0)
- 8-Oxo-7,8-dihydro-1,7-naphthyridine-3-carboxylic acid (CAS 1823941-77-0)
- 2-Oxo-1,2-dihydro-1,6-naphthyridine-3-carboxylic acid (CAS 219849-79-3)
- 3,4-Dihydro-4-oxoquinazoline-6-carboxylic Acid (CAS 33986-75-3)
- 4,5-Dihydro[1,2,5]oxadiazolo[3,4-f]cinnolin-3-ium-3-olate (CAS 257869-90-2)
- 4-Oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid (CAS 37976-17-3)
Recommended Standards
- 4-Nitroquinolin-3-ol (CAS 37487-46-0)
- 4-Nitroisoquinolin-3-ol (CAS 669769-53-3)
- 4-Oxo-3,4-dihydrophthalazine-1-carboxylic acid (CAS 3260-44-4)
- 4-Nitroisoquinolin-1(2H)-one (CAS 55404-29-0)
- 3-Amino-1-ethyl-1-(pyridin-4-yl)-1lambda4-piperidin-2-one (CAS 1443292-08-7)
- 3-(Propan-2-yloxy)propanenitrile (CAS 110-47-4)
- 3-(Difluoromethyl)naphthalen-2-amine (CAS 1261687-22-2)
- 2,2,2-Trifluoroacetic acid compound with 2-((2S,5R,8S,11S)-8-(4-aminobutyl)-11-(3-guanidinopropyl)-5-(4-hydroxybenzyl)-3,6,9,12,15-pentaoxo-1,4,7,10,13-pentaazacyclopentadecan-2-yl)acetic acid (2:1) (CAS 250612-42-1)
- Benzyl-d7 Alcohol (CAS 71258-23-6)
- Ethyl 3-(2-(4-amino-1,2,5-oxadiazol-3-yl)-1H-benzo[d]imidazol-1-yl)propanoate (CAS 696649-37-3)
- (R)-2-Phenylpropan-1-ol (CAS 19141-40-3)
- Dimethyl Phosphate-d6 (Major) Sodium Salt (CAS 157487-94-0)
- 5-Oxo-1-(2-phenylethyl)pyrrolidine-3-carbonyl chloride (CAS 29451-88-5)
- Semaglutide impurity 29 (CAS CATO-C4X-222629)
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