5-Chloro-1H-[1,2,3]triazole-4-carboxylic acidmethyl ester CAS 88474-33-3
| CAS No. | 88474-33-3 |
| Molecular Formula | C4H4ClN3O2 |
| Molecular Weight | 161.55 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Chloro-1H-[1,2,3]triazole-4-carboxylic acidmethyl ester is closely related to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
5-Chloro-1H-[1,2,3]triazole-4-carboxylic acidmethyl ester (CAS 88474-33-3), molecular formula C4H4ClN3O2 and molecular weight 161.55 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H4ClN3O2, 5-Chloro-1H-[1,2,3]triazole-4-carboxylic acidmethyl ester contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 161.55 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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), 5-Chloro-1H-[1,2,3]triazole-4-carboxylic acidmethyl 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 | C4H4ClN3O2 |
| Molecular Weight | 161.55 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 DMSO, DMF, methanol |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1982 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Chloro Standards
- 1428577-87-0 5-Chloro-1-(~2~H_3_)methyl-4-nitro-1H-pyrazole DTXSID40857353 (CAS 1428577-87-0)
- 2-Chloro-1-methyl-4-nitro-1H-imidazole (CAS 63634-21-9)
- 2-Chloro-1-methyl-5-nitro-1H-imidazole (CAS 86072-07-3)
- 2-chloro-N-(1H-1,2,3,4-tetrazol-5-yl)acetamide (CAS 6158-78-7)
- 3-Chloro-1-methyl-4-nitro-1H-pyrazole (CAS 299930-70-4)
- 4-Chloro-1-methyl-2-nitro-1H-imidazole (CAS 63634-20-8)
- 4-chloro-1-methyl-5-nitro-1H-pyrazole (CAS 84547-95-5)
- 4-Chloro-2-methyl-5-nitro-1H-imidazole (CAS 63662-67-9)
Recommended Standards
- 5-Amino-4-chloro-1H-pyrazole-3-carboxylic acid (CAS 351990-69-7)
- 5-Chloro-1H-1,2,4-triazole-3-carbohydrazide (CAS 199292-15-4)
- 5-(Chloromethyl)-1,2,4-oxadiazole-3-carboxamide (CAS 34879-29-3)
- 5-Chloro-1-methyl-4-nitro-pyrazole, 97% (CAS 42098-25-9)
- 3-(2-Phenoxyethoxy)piperidine hydrochloride (CAS 1220036-66-7)
- 5-bromo-1-benzothiophene-3-carboxylic acid (CAS 7312-24-5)
- 3-Methoxy-4-(2-methoxyethoxy)phenylboronic acid (CAS 1189126-31-5)
- 1-(3-Bromoprop-1-en-2-yl)-4-methoxybenzene (CAS 186552-95-4)
- 2-(2-Amino-4-(trifluoromethyl)phenyl)acetonitrile (CAS 875099-53-9)
- Aldosterone-d7 (CAS CATO-CCAD302747)
- (5-Cyclopropyl-2-methoxyphenyl)methanamine (CAS 1250495-80-7)
- tert-Butyl 2-(aminomethyl)-5,5-difluoropiperidine-1-carboxylate (CAS 1255666-42-2)
- 6-Phenyl-1H-pyrrolo[3,2-b]pyridine-3-carboxylic acid (CAS 1227270-42-9)
- Gastrin Tetrapeptide (CAS 1947-37-1)
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