1-Chloromethyl-1H-pyrazole hydrochloride, 97% CAS 73901-67-4
| CAS No. | 73901-67-4 |
| Molecular Formula | C4H5ClN2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
1-Chloromethyl-1H-pyrazole hydrochloride, 97% (CAS 73901-67-4) is a high-purity analytical reference standard with the molecular formula C4H5ClN2HCl and a molecular weight of 153.01 g/mol.
1-Chloromethyl-1H-pyrazole hydrochloride, 97% (C4H5ClN2HCl) contains a nitrile group, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C4H5ClN2 HCl |
| Molecular Weight | 153.01 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloromethyl Standards
- 7-(Chloromethyl)-3-methyl-5H-thiazolo[3,2-a]pyrimidin-5-one (CAS 100003-81-4)
- 7-(Chloromethyl)-2,3-dimethyl-5H-thiazolo[3,2-a]pyrimidin-5-one (CAS 100003-82-5)
- 7-(Chloromethyl)-3-(4-chlorophenyl)-5H-thiazolo[3,2-a]pyrimidin-5-one (CAS 100003-85-8)
- chloromethyl 2-ethoxy-2-methylpropanoate (CAS 1000296-74-1)
- 5-(chloromethyl)-N-(4-methylbenzyl)-1,3,4-thiadiazole-2-carboxamide (CAS 1000932-24-0)
- 5-(Chloromethyl)-7-ethoxy-2-(trifluoromethyl)-[1,2,4]triazolo[1,5-a]pyrimidine (CAS 1000932-47-7)
- 5-(chloromethyl)-N-(4-fluorobenzyl)-1,3,4-thiadiazole-2-carboxamide (CAS 1000932-60-4)
- 2-(Chloromethyl)-5,6-diphenylfuro[2,3-d]pyrimidin-4-amine (CAS 1000933-67-4)
Recommended Standards
- ethyl 1-(4-chlorobenzyl)-6-oxo-6,7-dihydro-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (CAS 1245807-75-3)
- 4-Ethylmorpholine-3-carboxylic acid hydrochloride (CAS 1427378-51-5)
- 3-Bromo-4-(thiazolidin-3-yl)benzaldehyde (CAS 1713163-11-1)
- Z-Arg-pNA · HCl (CAS 59188-53-3)
- 1-(5-Bromo-2-chlorobenzyl)piperazine (CAS 1250819-32-9)
- 7-Fluoro-2,3-dihydro-4H-pyrano[3,2-b]pyridin-4-one (CAS 1561782-02-2)
- 3-(Tert-butyl)-5-(4-fluoropyrrolidin-2-yl)-1,2,4-oxadiazole (CAS 2097936-77-9)
- Octane-2,3-diol (CAS 20653-90-1)
- 1-(2,5-Dimethoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one (CAS 1082528-65-1)
- [3-31]-Semaglutide D (CAS C152H230N42O47)
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