5-Methoxy-4-methyl-2-nitrobenzoic acid CAS 857599-32-7
| CAS No. | 857599-32-7 |
| Molecular Formula | C9H9NO5 |
| Molecular Weight | 211.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Methoxy-4-methyl-2-nitrobenzoic acid (C9H9NO5) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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-Methoxy-4-methyl-2-nitrobenzoic acid (CAS 857599-32-7), molecular formula C9H9NO5 and molecular weight 211.17 g/mol, is a CATO reference standard with documented purity and traceability.
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-Methoxy-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 | C9H9NO5 |
| Molecular Weight | 211.17 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.) | 1987 |
| Nitrogen Atoms | 1 |
Related Methoxy Standards
- 3-Methoxy-4-methyl-5-nitrobenzoic acid (CAS 1002110-78-2)
- 2-Methoxy-6-(methoxycarbonyl)isonicotinic acid (CAS 1373960-20-3)
- 5-Methoxy-2-methyl-4-nitrobenzoic acid (CAS 1401423-31-1)
- Methyl 4-methoxy-2-nitrobenzoate (CAS 181871-73-8)
- (2-Methoxy-5-nitrophenyl)acetic acid (CAS 51073-04-2)
- 2-(3-Methoxy-2-nitrophenyl)acetic Acid (CAS 20876-31-7)
- 2-(3-Methoxy-4-nitrophenyl)acetic Acid (CAS 5803-22-5)
- 2-(4-Methoxy-2-nitrophenyl)acetic acid (CAS 20876-30-6)
Recommended Standards
- 5-Methoxy-2-nitrophenylacetic Acid (CAS 20876-29-3)
- 5-nitro-2-(oxiran-2-ylmethoxy)phenol (CAS 682339-44-2)
- 5-Ethoxy-2-nitrobenzoic acid (CAS 78361-06-5)
- 6-Methoxy-2-methyl-3-nitrobenzoic acid (CAS 474454-46-1)
- 1-Ethyl-3-(5-mercapto-4-methyl-4H-1,2,4-triazol-3-yl)pyridin-2(1H)-one (CAS 1105196-08-4)
- 6-Cinnamyl-5,7-dimethyl-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 691887-97-5)
- tert-Butyl 3-(diphenylamino)benzoate (CAS 850232-08-5)
- Choline Fenofibrate EP Impurity B (CAS 42017-89-0)
- Ceftazidime Impurity 92 (CAS CATO-C4X-121292)
- 1-(Prop-2-yn-1-yl)indolin-2-one (CAS 37994-11-9)
- (2E,13Z)-octadeca-2,13-dienal (CAS 99577-57-8)
- Ethyl nonadecanoate (CAS 18281-04-4)
- 3-Fluoro-n-(2-hydroxypropyl)-4-methylbenzenesulfonamide (CAS 1154107-75-1)
- Semaglutide Impurity 18 (CAS 1671100-14-3)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com