1-(Chloromethyl)-4-methyl-1h-pyrazole CAS 757152-30-0
| CAS No. | 757152-30-0 |
| Molecular Formula | C5H7ClN2 |
| Molecular Weight | 130.58 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1-(Chloromethyl)-4-methyl-1h-pyrazole is closely related to a nitrile group, chlorine substitution in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
1-(Chloromethyl)-4-methyl-1h-pyrazole (CAS 757152-30-0) is a high-purity analytical reference standard with the molecular formula C5H7ClN2 and a molecular weight of 130.58 g/mol.
Owing to a nitrile group, chlorine substitution, 1-(Chloromethyl)-4-methyl-1h-pyrazole is typically white to pale yellow liquid. Its solid-state physicochemical attributes — including a molecular weight of 130.58 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
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 | C5H7ClN2 |
| Molecular Weight | 130.58 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 | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Chloromethyl Standards
- 2-(Chloromethyl)-1-methyl-1H-imidazole (CAS 19225-92-4)
- 2-(Chloromethyl)-4-methyl-1H-imidazole (CAS 863399-37-5)
- 3-(Chloromethyl)-1-methylpyrazole (CAS 84547-64-8)
- 3-(Chloromethyl)-5-methyl-1H-pyrazole (CAS 41669-05-0)
- 4-(Chloromethyl)-2-methyl-1H-imidazole (CAS 408325-19-9)
- 3-(Chloromethyl)cyclopent-2-enone (CAS 110874-87-8)
- 3-(Chloromethyl)-2-methylfuran (CAS 14497-33-7)
- 4-(Chloromethyl)cyclohex-1-ene (CAS 2555-08-0)
Recommended Standards
- 1-(2-Chloroethyl)-1H-imidazole (CAS 92952-84-6)
- 1-Morpholinopropan-2-one oxime (CAS 92503-13-4)
- 5-Chloro-1,4-dimethyl-1H-imidazole (CAS 1856095-84-5)
- 2-Chloro-1-ethyl-1H-imidazole (CAS 946061-13-8)
- 4-(Chloromethyl)-2-(4-methoxyphenyl)-1,3-thiazole hydrochloride (CAS 1052538-51-8)
- 1-tert-Butylpiperidin-4-ol (CAS 5382-30-9)
- (5-(2,4-Difluorophenyl)oxazol-4-yl)methanamine (CAS 1521565-01-4)
- 4-Hydroxy-5-methylcyclopent-4-ene-1,3-dione (CAS 1696-34-0)
- (3aR,6S,6aR)-2,2,6-trimethyl-3a,5,6,6a-tetrahydrocyclopenta[d][1,3]dioxol-4-one (CAS 148969-55-5)
- Melitracen Impurity 1 (CAS 85118-29-2)
- Methyl 5-bromo-2-propan-2-yloxypyridine-3-carboxylate (CAS 1781982-05-5)
- Halosulfuron (free acid) (CAS 135397-30-7)
- potassium hydrogen [2-carboxy-2-(propan-2-ylidene)ethyl]phosphonate (CAS 117012-81-4)
- Palmitoyl Hexapeptide-12 (CAS 171263-26-6)
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