Fluorouracil Impurity N2 CAS 55996-26-4
| CAS No. | 55996-26-4 |
| Molecular Formula | C8H12N2O3 |
| Molecular Weight | 184.19 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Fluorouracil Impurity N2 (C8H12N2O3) contains an amino-acid-derived structure, 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.
Fluorouracil Impurity N2 (CAS 55996-26-4) is a certified pharmaceutical impurity reference standard with the molecular formula C8H12N2O3 and a molecular weight of 184.19 g/mol.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C8H12N2O3 |
| Molecular Weight | 184.19 g/mol |
| Appearance | Off-white to pale 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) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 2 |
Related Fluorouracil Standards
- Fluorouracil Impurity 17 (CAS 5440-00-6)
- Fluorouracil Impurity 27 (CAS 2566704-13-8)
- Fluorouracil Impurity 18 (CAS CATO-C4X-164918)
- Fluorouracil Impurity 23 (CAS CATO-C4X-164923)
- Fluorouracil Impurity 29 (CAS CATO-C4X-164929)
- Fluorouracil Impurity 8 (CAS 726207-85-8)
- Fluorouracil EP Impurity F (CAS 56177-80-1)
- Fluorouracil Impurity 28 (CAS CATO-C4X-164928)
Recommended Standards
- Ethyl 6-methyl-3-oxo-2,3,4,5-tetrahydropyridazine-4-carboxylate (CAS 98489-92-0)
- Imidazo[2,1-a]isoquinolin-2(3H)-one (CAS 62471-86-7)
- ethyl 5-amino-2-ethyl-1,3-oxazole-4-carboxylate (CAS 86186-69-8)
- Isobutyl 2-oxo-2,3-dihydro-1H-imidazole-4-carboxylate (CAS 93805-09-5)
- Pitavastatin Impurity 55 (CAS 1187966-94-4)
- S-Elagolix Impurity 7 (CAS CATO-C4X-20687)
- Roflumilast Impurity 53 (CAS 2204417-23-0)
- tert-Butyl 3-{[4-(tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]methyl}piperidine-1-carboxylate (CAS 1092563-71-7)
- 2,6-Dimethyl-3-(3-methoxyphenyl)propiophenone (CAS 898774-80-6)
- n-[(4-ethyl-5-methyl-4h-1,2,4-triazol-3-yl)methyl]-N-methylpyrrolidin-3-amine (CAS 1421601-25-3)
- 1,5-Anhydro-4,6-O-benzylidene-D-glucitol (CAS 65190-39-8)
- 1-(4-Nitrophenyl)-1H-1,2,3-triazole-4,5-dicarbohydrazide (CAS 156361-37-4)
- Palonosetron Impurity 18 (CAS 91245-72-6)
- Liraglutide Impurity 10 TFA Salt (CAS CATO-C4X-199210)
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