| CAS No. | 17276-91-4 |
| Molecular Formula | C8H7NO5 |
| Molecular Weight | 197.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Compared with other compounds in its class, the molecular weight of 197.14 g/mol gives 2-Hydroxy-4-methyl-5-nitrobenzoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2-Hydroxy-4-methyl-5-nitrobenzoic acid (CAS 17276-91-4) is a high-purity analytical reference standard with the molecular formula C8H7NO5 and a molecular weight of 197.14 g/mol.
The molecular framework of 2-Hydroxy-4-methyl-5-nitrobenzoic acid (C8H7NO5) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
CATO manufactures 2-Hydroxy-4-methyl-5-nitrobenzoic acid under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
| 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.) | 1961 |
| Nitrogen Atoms | 1 |