Furo[3,4-c]quinoline-1,3-dione CAS 4945-20-4
| CAS No. | 4945-20-4 |
| Molecular Formula | C11H5NO3 |
| Molecular Weight | 199.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Furo[3,4-c]quinoline-1,3-dione (CAS 4945-20-4), molecular formula C11H5NO3 and molecular weight 199.16 g/mol, is a CATO reference standard with documented purity and traceability.
Furo[3,4-c]quinoline-1,3-dione (C11H5NO3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, 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.
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 | C11H5NO3 |
| Molecular Weight | 199.16 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 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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Furo Standards
- Furo[3,4-b]quinoline-1,3-dione (CAS 4945-42-0)
- 1-(4H-Furo[3,2-b]indol-2-yl)ethanone (CAS 62144-26-7)
- ethyl furo[3,2-b]pyridine-2-carboxylate (CAS 138173-82-7)
- Furo[3,4-b]quinoxaline-1,3-dione (CAS 5660-34-4)
- Furo[3,4-f]quinazoline-7,9-dione (CAS 31611-50-4)
- ethyl furo[3,2-b]pyridine-6-carboxylate (CAS 122535-03-9)
- ethyl furo[2,3-c]pyridine-2-carboxylate (CAS 138173-83-8)
- Ethyl furo[3,2-c]pyridine-2-carboxylate (CAS 138173-84-9)
Recommended Standards
- Isopropyl 5-nitrofuran-2-carboxylate (CAS 20001-37-0)
- Ethyl 5-methyl-4-nitro-1H-pyrazole-3-carboxylate (CAS 28668-07-7)
- Methyl (2-(furan-2-yl)-1-hydroxy-2-oxoethyl)carbamate (CAS 324568-58-3)
- Ethyl 5-amino-4-carbamoylisoxazole-3-carboxylate (CAS 19950-15-3)
- 4-Chloro-N-[(4E)-2-oxo-3-phenyl-1,2,3,4-tetrahydroquinazolin-4-ylidene]benzene-1-sulfonamide (CAS 478044-04-1)
- tert-Butyl 3,3-difluoro-4-oxopiperidine-1-carboxylate (CAS 1215071-17-2)
- 5-(2,3-Dimethylphenyl)-3-methyl-5-oxovaleric acid (CAS 951894-18-1)
- 2-Methoxy-5-sulfamoylbenzoic Acid-d (CAS 123958-85-0)
- Nicardipine Hydrochloride EP Impurity C (CAS 21881-77-6)
- (S)-1-Acetylpyrrolidin-2-yl acetate (CAS 221911-75-7)
- 2-(4-Cyanophenyl)-1H-indole-6-carbonitrile (CAS 28719-00-8)
- 1-(5-Bromo-1-benzothiophen-3-yl)ethan-1-one (CAS 1423-63-8)
- 1-Boc-3-(3,4-dichlorophenyl)piperazine (CAS 185110-16-1)
- Thymopoietin II Peptide Fragment (CAS 56795-64-3)
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