2-Methyl-7-nitroquinoxaline CAS 120885-31-6
| CAS No. | 120885-31-6 |
| Molecular Formula | C9H7N3O2 |
| Molecular Weight | 189.17 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.
2-Methyl-7-nitroquinoxaline (CAS 120885-31-6), molecular formula C9H7N3O2 and molecular weight 189.17 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H7N3O2, 2-Methyl-7-nitroquinoxaline 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 189.17 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
As a certified reference material (CRM), 2-Methyl-7-nitroquinoxaline meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H7N3O2 |
| Molecular Weight | 189.17 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 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.) | 1991 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- 2-Methyl-5-nitroquinoxaline (CAS 76982-28-0)
- 2-Methyl-6-nitroquinoxaline (CAS 2942-02-1)
- 2-Nitroquinoxaline (CAS 117764-57-5)
- 5-Nitroquinoxaline (CAS 18514-76-6)
- 6-Nitroquinoxaline (CAS 6639-87-8)
- 6-Nitroquinoxaline-2,3-dione (CAS 2379-56-8)
- 8-Nitroquinoxaline-6-carboxylic acid (CAS 1706445-74-0)
- 6-Nitroquinoxaline-2-carboxylic acid (CAS 4244-37-5)
Recommended Standards
- Methyl 3-cyano-5-formylbenzoate (CAS 1205514-57-3)
- 2-(Furan-2-yl)nicotinic acid (CAS 1211533-05-9)
- 1-(Pyridin-3-yl)-1H-imidazole-5-carboxylic acid (CAS 1197398-67-6)
- 1-((5-Methylisoxazol-3-yl)methyl)-1h-1,2,4-triazole-3-carbonitrile (CAS 1223392-78-6)
- 4-(1H-Pyrrol-1-yl)phenethyl pyrimidine-5-carboxylate (CAS 823793-38-0)
- (2R,5R)-2,5-Diamino-6,6,6-trifluorohexanoic acid (CAS 1821735-76-5)
- (S)-1-(3,4-dimethylphenyl)-2-methylpropan-1-amine (CAS 1213170-93-4)
- n1-Cyclopentyl-n2,n2-diisopropylethane-1,2-diamine (CAS 859340-59-3)
- methyl 4-(chlorosulfonyl)-2-nitrobenzoate (CAS 1909317-51-6)
- Mogroside IIIA1 (CAS 88901-42-2)
- 4-(Chloromethyl)-2-methylhexane (CAS 128399-91-7)
- 3-Hydroxy-2,3-dimethylbutan-2-yl hydrogen (5-ethyl-2-methylthiophen-3-yl)boronate (CAS 2223031-03-4)
- (R)-Grepafloxacin (CAS 146761-68-4)
- Semaglutide impurity 23 (CAS CATO-C4X-222623)
Why CATO?
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