3-Methyl-Quinoxaline-2-Carboxylic Acid CAS 74003-63-7
| CAS No. | 74003-63-7 |
| Molecular Formula | C10H8N2O2 |
| Molecular Weight | 188.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
3-Methyl-Quinoxaline-2-Carboxylic Acid (CAS 74003-63-7) is a high-purity analytical reference standard with the molecular formula C10H8N2O2 and a molecular weight of 188.18 g/mol.
Based on its molecular formula C10H8N2O2, 3-Methyl-Quinoxaline-2-Carboxylic Acid 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 188.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C10H8N2O2 |
| Molecular Weight | 188.18 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 2 |
Related Methyl Standards
- Methyl quinoxaline-5-carboxylate (CAS 6924-71-6)
- Quinoxaline-6-carbohydrazide (CAS 175204-23-6)
- Quinoxaline-2-carbohydrazide (CAS 54571-06-1)
- Quinoxaline-5-carbonyl chloride (CAS 717871-86-8)
- Quinoxaline-6-carbonyl chloride (CAS 258503-93-4)
- Quinoxaline, 6-chloro-2-methoxy- (CAS 104152-39-8)
- Quinoxaline-2,3-dicarbonitrile (CAS 17132-92-2)
- Quinoxaline-2,3,6-triol (CAS 60729-17-1)
Recommended Standards
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- Perampanel Impurity 38 (CAS 142929-10-0)
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- 7-bromo-3-methyl-imidazo[1,2-a]pyridine (CAS 1276026-68-6)
- Methyl 2-[8-bromo-6-methyl-4-oxo-2-(trifluoromethyl)-3,4-dihydroquinazolin-3-yl]acetate (CAS 866151-16-8)
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- 2-((7-Chloroquinolin-4-yl)thio)acetohydrazide (CAS 306935-50-2)
- Methyl 4-(benzenesulfonyl)-4-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]butanoate (CAS 338406-82-9)
- 5-Bromo-6-chloropyridine-2,3-diamine (CAS 1195519-49-3)
- 2-[(3-Methoxyphenyl)methyl]piperazine (CAS 218594-59-3)
- Liraglutide(13-31)TFA Salt (CAS CATO-C4X-19929)
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