3,5-Dimethoxy-4-methyl-2-nitrobenzoic acid CAS 76447-19-3
| CAS No. | 76447-19-3 |
| Molecular Formula | C21H34BN3O4 |
| Molecular Weight | 403.32 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 3,5-Dimethoxy-4-methyl-2-nitrobenzoic acid (CAS 76447-19-3), a certified reference material (molecular formula C21H34BN3O4, MW 403.32 g/mol) for analytical method development and quality control.
Structurally, 3,5-Dimethoxy-4-methyl-2-nitrobenzoic acid (C21H34BN3O4) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.5, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 403.32 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C21H34BN3O4 |
| Molecular Weight | 403.32 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 3 |
Related Dimethoxy Standards
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Recommended Standards
- 2-{[(2,6-dichlorophenyl)methyl]sulfanyl}-4-[(E)-2-(4-methoxyphenyl)ethenyl]pyrimidine (CAS 339278-39-6)
- 4-Bromo-N-{[5-(methylsulfanyl)-4-(prop-2-en-1-yl)-4H-1,2,4-triazol-3-yl]methyl}benzene-1-sulfonamide (CAS 338794-44-8)
- 2,2-Dimethyl-1-(4-phenyl-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-indol-1-yl)propan-1-one (CAS 2390149-11-6)
- tert-Butyl (R)-6-methoxy-1-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydroisoquinoline-2(1H)-carboxylate (CAS 2766800-05-7)
- 5-chloro-8-methoxy-1,2,3,4-tetrahydroquinoline hydrochloride (CAS 1251925-38-8)
- 5-methyl-1H-1,3-benzodiazole-2-carboxylic acid (CAS 99459-47-9)
- 2-Morpholinothiazole-5-carbaldehyde (CAS 1011-41-2)
- (Z)-[(2,4-Dichlorophenyl)methoxy]({[3-(4-fluorophenyl)-1H-pyrazol-4-yl]methylidene})amine (CAS 477711-34-5)
- 7H-[1,2,4]triazolo[4,3-b][1,2,4]triazol-3-amine (CAS 13728-21-7)
- Sodium 2-methylpropane-1-sulfinate (CAS 39170-40-6)
- 2-Bromomethyl-isonicotinic acid methyl ester hydrobromide (CAS 1956366-21-4)
- 2-(4-{[3,5-bis(trifluoromethyl)phenyl]methoxy}phenyl)-4-(thiophen-2-yl)pyrimidine (CAS 477862-24-1)
- Desloratadine Impurity 83 (CAS 26699-73-0)
- Tirzepatide Impurity 37 (CAS CATO-C4X-324037)
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