2-Methoxy-5-methyl-3-nitropyridine CAS 33252-62-9
| CAS No. | 33252-62-9 |
| Molecular Formula | C7H8N2O3 |
| Molecular Weight | 168.15 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-Methoxy-5-methyl-3-nitropyridine (CAS 33252-62-9), molecular formula C7H8N2O3 and molecular weight 168.15 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H8N2O3, 2-Methoxy-5-methyl-3-nitropyridine contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 168.15 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C7H8N2O3 |
| Molecular Weight | 168.15 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, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Nitrogen Atoms | 2 |
Related Methoxy Standards
- 2-Methoxy-6-methyl-3-nitropyridine (CAS 112163-03-8)
- 5-Methoxy-2-methylpyrimidine-4-carboxylic acid (CAS 113949-10-3)
- 6-Methoxy-5-methylpyrimidine-4-carboxylic acid (CAS 1211507-53-7)
- 5-Methoxy-2-methyl-3-nitropyridine (CAS 1211534-67-6)
- 2-Methoxy-4-methylpyrimidine-5-carboxylic acid (CAS 1228113-00-5)
- 5-Methoxy-3-methylpyrazine-2-carboxylic Acid (CAS 1262860-60-5)
- (6S)-6-Methoxy-4,6-dihydrofuro[3,2-c]pyran-2-one (CAS 131149-16-1)
- 2-Methoxy-6-methylpyrimidine-4-carboxylic acid (CAS 136518-00-8)
Recommended Standards
- 2-Methoxy-4-methyl-5-nitropyridine (CAS 6635-90-1)
- 2-Methoxy-5-nitro-6-picoline (CAS 5467-69-6)
- 2-Methoxy-3-nitroaniline (CAS 85-45-0)
- 2-Methoxybenzo[d][1,3]dioxol-4-ol (CAS 61627-36-9)
- 5-Aminoquinoline-8-carboxylic acid (CAS 80690-06-8)
- 2,4-difluoro-1-propyl-1H-1,3-benzodiazole (CAS 2300831-06-3)
- 1-(2-Amino-4-fluorophenyl)-4-piperidinol (CAS 1019507-61-9)
- 2-(2-Bromo-3,4-dimethoxyphenyl)acetic acid (CAS 63856-83-7)
- 3-(Cyclopropylmethyl)-5-isoxazolamine (CAS 1248170-88-8)
- 2-Acetyl-1-pyrroline 13C5 in DCM (CAS 1449323-18-5)
- 3-(5-Methylfuran-2-yl)-N-(1,2,3,4-tetrahydronaphthalen-2-yl)propanamide (CAS 878694-70-3)
- Medroxyprogesterone Acetate EP Impurity A (CAS 984-47-4)
- 1-(3-chlorophenyl)propan-2-amine hydrochloride (CAS 35378-15-5)
- Semaglutide Impurity 3 (CAS CATO-C4X-22263)
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