1H-Pyrazole-3-carboxylic acid, 4-nitro-, 2-chloroethyl ester CAS 923283-70-9
| CAS No. | 923283-70-9 |
| Molecular Formula | C6H6ClN3O4 |
| Molecular Weight | 219.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 219.58 g/mol gives 1H-Pyrazole-3-carboxylic acid, 4-nitro-, 2-chloroethyl ester distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
1H-Pyrazole-3-carboxylic acid, 4-nitro-, 2-chloroethyl ester (CAS 923283-70-9) is a high-purity analytical reference standard with the molecular formula C6H6ClN3O4 and a molecular weight of 219.58 g/mol.
Structurally, 1H-Pyrazole-3-carboxylic acid, 4-nitro-, 2-chloroethyl ester (C6H6ClN3O4) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 5.0, corresponding to approximately 5 ring(s) or double-bond equivalent(s). With a molecular weight of 219.58 g/mol, it falls into the medium-molecular-weight range. 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).
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-3-carboxylic acid, 4-nitro-, 2-chloroethyl ester 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 | C6H6ClN3O4 |
| Molecular Weight | 219.58 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related H Standards
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- 1-(1H-Pyrazole-3-carbonyl)piperidine-3-carboxylic acid (CAS 1152866-96-0)
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Recommended Standards
- (5-Nitrofuran-2-yl)methyl 2-chloroacetate (CAS 6628-60-0)
- 2-Chloro-4,6-dimethoxy-5-nitropyrimidine (CAS 478010-54-7)
- (4-Chloro-5-methyl-3-nitro-1H-pyrazol-1-yl)acetic acid (CAS 351996-53-7)
- 4-Chloro-2,6-dimethoxy-5-nitropyrimidine (CAS 60331-03-5)
- (2-(Dimethyl(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)silyl)phenyl)methanol (CAS 947515-75-5)
- (2E)-3-(dimethylamino)-1-(1-ethyl-1h-pyrazol-3-yl)prop-2-en-1-one (CAS 1006352-73-3)
- 2-(2-Phenoxyethoxy)aniline (CAS 114012-05-4)
- 2-Chloro-5-[3-(4-chlorophenyl)-1,2,4-oxadiazol-5-yl]pyridine (CAS 337920-77-1)
- Dodecyl 2-Dimethylaminopropionate HCl (CAS 259685-49-9)
- 2-(3-Chlorophenyl)-2'-oxospiro[cyclopropane-1,3'-indoline]-5'-carboxylic acid (CAS 1707605-77-3)
- 3-Cyclopropyl-5-oxa-2-azaspiro[3.4]Octan-1-one (CAS 1820687-31-7)
- 3,4-Dihydropyrrolo[1,2-a]pyrimidin-6(2H)-one (CAS 503609-25-4)
- 7-(4-Isopropylphenyl)-4-methyl-2-(methylthio)-6,7-dihydro-5H-pyrrolo[2,3-d]pyrimidine (CAS 338415-89-7)
- Tetrapeptide-3 (CAS 827306-97-8)
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