1h-Pyrazole-4-carboxylic acid hydrate CAS 1209620-58-5
| CAS No. | 1209620-58-5 |
| Molecular Formula | C4H4N2O2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 130.10 g/mol gives 1h-Pyrazole-4-carboxylic acid hydrate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 1h-Pyrazole-4-carboxylic acid hydrate (CAS 1209620-58-5), a certified reference material (molecular formula C4H4N2O2H2O, MW 130.10 g/mol) for analytical method development and quality control.
Based on its molecular formula C4H4N2O2H2O, 1h-Pyrazole-4-carboxylic acid hydrate contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 130.10 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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), 1h-Pyrazole-4-carboxylic acid hydrate 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 | C4H4N2O2 H2O |
| Molecular Weight | 130.10 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 2 |
Related h Standards
- 1H-Pyrazole-3-carboxylic acid, 1-ethyl-5-(trifluoromethyl)- (CAS 1004643-70-2)
- 1H-Pyrazole-3-carboxylic acid, 4-bromo-1-propyl- (CAS 1006319-30-7)
- 1H-Pyrazole-4-methanamine, N,3-dimethyl- (CAS 1007521-02-9)
- 1h-Pyrazole-4-carbothioamide (CAS 1017781-31-5)
- 1017782-45-4 1H-Pyrazole-4-carboxylic acid, 3-(1,1-dimethylethyl)-, methyl ester (CAS 1017782-45-4)
- 4-(1H-Pyrazole-4-yl)benzaldehyde (CAS 1017794-45-4)
- 1H-Pyrazole-4-carboxamide, 5-chloro-N,1-dimethyl- (CAS 1020713-28-3)
- 1H-Pyrazole-4-carbonyl chloride (CAS 103286-53-9)
Recommended Standards
- 5-(Bromomethyl)-2-(difluoromethoxy)pyridine (CAS 1375098-08-0)
- 1-(2-Methoxyethyl)-1H-indol-4-amine (CAS 1322604-93-2)
- 2,3,4-Trifluoro-6-nitroaniline (CAS 148416-38-0)
- Ethyl 4,5-dichloro-2-fluorophenylacetate (CAS 1805479-66-6)
- Benzyl 4-(2-chloro-5-nitrophenyl)-7-(3,4-dimethoxyphenyl)-2-methyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate (CAS 503864-67-3)
- ((1R,4S,5R)-2-azabicyclo[2.1.1]Hexan-5-yl)methanol (CAS 773839-73-9)
- Arylex (CAS 943831-98-9)
- 3-Isopropylthiazolidine-2,4-dione (CAS 39137-26-3)
- Hexanedioic acid, polymer with 2,3-dibromo-2-butene-1,4-diol (CAS 69725-52-6)
- TAT 14 Peptide (Nrf2 Activator III) (CAS 1362661-34-4)
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