5-Nitro (1H)Indazole-4-carboxylic Acid Methyl Ester CAS 1082041-65-3
| CAS No. | 1082041-65-3 |
| Molecular Formula | C9H7N3O4 |
| Molecular Weight | 221.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Nitro (1H)Indazole-4-carboxylic Acid Methyl Ester is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Nitro (1H)Indazole-4-carboxylic Acid Methyl Ester (CAS 1082041-65-3), molecular formula C9H7N3O4 and molecular weight 221.17 g/mol, is a CATO reference standard with documented purity and traceability.
5-Nitro (1H)Indazole-4-carboxylic Acid Methyl Ester (C9H7N3O4) 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C9H7N3O4 |
| Molecular Weight | 221.17 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 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1989 |
| Nitrogen Atoms | 3 |
Related Nitro Standards
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- 7-Nitro-1H-indazol-5-yl acetate (CAS 1031927-26-0)
- 1-Methyl-6-nitro-1H-indazole-3-carboxylic acid (CAS 1058740-77-4)
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- Methyl 7-nitro-1-benzofuran-2-carboxylate (CAS 114305-84-9)
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Recommended Standards
- 1-Methyl-1H-pyrazolo[3,4-b]pyridine-5,6-dicarboxylic acid (CAS 106057-33-4)
- 4-(3,5-Dioxo-1,2,4-triazolidin-1-yl)benzoic acid (CAS 1087784-49-3)
- 3,4-Dihydro-1,4-benzoxazine-3-one 6-oxoacetic Acid (CAS 1094428-30-4)
- Methyl 5-nitrobenzofuran-2-carboxylate (CAS 104862-11-5)
- 3-Methoxyquinoline 1-oxide (CAS 57244-56-1)
- 1-{1,4-diazaspiro[5.5]undecan-1-yl}ethan-1-one (CAS 1423941-23-4)
- (E)-3-chloro-2-(2-(pyridin-3-ylmethylene)hydrazinyl)-5-(trifluoromethyl)pyridine (CAS 339099-61-5)
- Opicapone impurity 38 (CAS CATO-C4X-240438)
- 4-{2-[3-chloro-5-(trifluoromethyl)-2-pyridinyl]hydrazono}-4-phenylbutanoic acid (CAS 338397-43-6)
- 1-(3-Methylureido)cyclopentane-1-carboxylic acid (CAS 954567-53-4)
- (Deamino-Cys1,Lys8)-Oxytocin trifluoroacetate salt (CAS 25529-45-7)
- (S)-2-Amino-3-cyano-4-methyl-4,5,6,7-tetrahydrobenzo[b]thiophene-4-carboxylic acid (CAS 2749963-99-1)
- 4-(Cyclobutylmethoxy)-3,5-difluoroaniline (CAS 1707369-83-2)
- Semaglutide impurity 247 (CAS CATO-C4X-2226247)
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