5-Hydroxy-4-methyl-2-nitrobenzoic acid CAS 6632-24-2
| CAS No. | 6632-24-2 |
| Molecular Formula | C8H7NO5 |
| Molecular Weight | 197.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, 5-Hydroxy-4-methyl-2-nitrobenzoic acid (C8H7NO5) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 197.14 g/mol, it falls into the medium-molecular-weight range. 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).
5-Hydroxy-4-methyl-2-nitrobenzoic acid (CAS 6632-24-2) is a high-purity analytical reference standard with the molecular formula C8H7NO5 and a molecular weight of 197.14 g/mol.
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.
As a certified reference material (CRM), 5-Hydroxy-4-methyl-2-nitrobenzoic acid 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 | C8H7NO5 |
| Molecular Weight | 197.14 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 1 |
Related Hydroxy Standards
- 2-Hydroxy-2-(4-nitrophenyl)acetic acid (CAS 10098-39-2)
- Methyl 2-hydroxy-6-nitrobenzoate (CAS 1261504-50-0)
- 2-(3-Hydroxy-5-nitrophenyl)acetic acid (CAS 1261746-17-1)
- Methyl 2-hydroxy-4-nitrobenzoate, 97% (CAS 13684-28-1)
- 2-Hydroxy-6-(methoxycarbonyl)isonicotinic acid (CAS 1373959-10-4)
- 4-Hydroxy-6-(methoxycarbonyl)picolinic acid (CAS 1374754-19-4)
- 6-Hydroxy-4-(methoxycarbonyl)picolinic acid (CAS 1393531-84-4)
- 2-(3-Hydroxy-4-nitrophenyl)acetic acid (CAS 152148-79-3)
Recommended Standards
- 5-Hydroxy-4-(methoxycarbonyl)nicotinic acid (CAS 243980-03-2)
- 6-Methyl-2-oxo-1,2-dihydropyridine-3,4-dicarboxylic acid (CAS 2860-55-1)
- 5-Hydroxy-2-methyl-4-nitrobenzoic acid (CAS 199929-14-1)
- 7-Nitro-2,3-dihydro-1,4-benzodioxin-6-ol (CAS 97398-65-7)
- Methyl 2-(3-nitropyridin-2-yl)acetate (CAS 1610729-62-8)
- 4-(Carboxymethyl-amino)-piperidine-1-carboxylic acid benzyl ester (CAS 1353986-69-2)
- 1-((2,4-Difluorophenyl)sulfonyl)piperazine hydrochloride (CAS 1170204-51-9)
- (2R,5R)-1-Benzyl 2-methyl 5-methyl-3-oxopyrrolidine-1,2-dicarboxylate (CAS 2761985-32-2)
- Methyl 4-(4-methyl-5-(2-(trifluoromethyl)phenyl)-4H-1,2,4-triazol-3-yl)bicyclo[2.2.2]octane-1-carboxylate (CAS 719274-90-5)
- Piroxicam Impurity 16 (CAS 1797884-12-8)
- 2-(Aminomethyl)-3-(difluoromethyl)-4-fluoro-6-methoxypyridine (CAS 1804423-78-6)
- 3-Oxo-3H-spiro[isobenzofuran-1,9'-xanthene]-3',6'-diyl bis(dihydrogen phosphate) (CAS 134869-03-7)
- 3-(1-Methyl-1H-pyrrol-2-yl)-5-(piperidin-4-yl)-1,2,4-oxadiazole (CAS 1638666-45-1)
- Semaglutide impurity 87 (CAS CATO-C4X-222687)
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