5-Ethyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic acid CAS 856437-81-5
| CAS No. | 856437-81-5 |
| Molecular Formula | C10H14N2O2 |
| Molecular Weight | 194.23 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
5-Ethyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic acid (C10H14N2O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, its high carbon-to-hydrogen ratio confers good lipid solubility, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
5-Ethyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic acid (CAS 856437-81-5) is a high-purity analytical reference standard with the molecular formula C10H14N2O2 and a molecular weight of 194.23 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-Ethyl-4,5,6,7-tetrahydro-1H-indazole-3-carboxylic 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 | C10H14N2O2 |
| Molecular Weight | 194.23 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 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
Related Ethyl Standards
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- 6-((Tetrahydro-2H-pyran-4-yl)oxy)pyridin-3-amine (CAS 1180133-65-6)
- 2-((Tetrahydro-2H-pyran-4-yl)oxy)pyridin-3-amine (CAS 1211758-68-7)
- 4-((Tetrahydro-2H-pyran-4-yl)oxy)pyridin-3-amine (CAS 1248739-43-6)
- Ethyl 4,5,6,7-tetrahydro-1H-indazole-4-carboxylate (CAS 1251015-04-9)
- 3-((Tetrahydro-2H-pyran-2-yl)oxy)phenol (CAS 132681-13-1)
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Recommended Standards
- 5-Amino-3-methyl-isothiazole-4-sulfonic acid (CAS 4590-59-4)
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- 5-Amino-2-methoxy-N,N-dimethylbenzamide (CAS 22802-73-9)
- 5-Isopropyl-2-methoxybenzoic acid (CAS 68014-67-5)
- 1-Phenyl-3-guanylthiourea (CAS 15989-47-6)
- 2-((Pyridin-3-ylmethyl)carbamoyl)cyclopropane-1-carboxylic acid (CAS 811841-75-5)
- 3-Borono-2-methylbenzoic acid (CAS 1314264-61-3)
- 2,3-Dibromo-6-fluorobenzonitrile (CAS 1805122-97-7)
- 1-[(6-Methoxypyridin-3-yl)methyl]-3-methylurea (CAS 1602194-44-4)
- 4-(Benzyloxy)-2'-methyl[1,1'-biphenyl]-3-carbaldehyde (CAS 893735-20-1)
- 4-Fluoronaphthalen-2-ol (CAS 1261683-46-8)
- 9-Bromo-2,4,7-trichloro-9H-fluorene (CAS 7012-19-3)
- 2-((4-(4-Ethoxyphenyl)-5-(pyridin-3-yl)-4H-1,2,4-triazol-3-yl)thio)-N-(4-fluorophenyl)acetamide (CAS 477332-67-5)
- Peptide Impurity 27 (CAS 1350456-68-6)
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