1-Methyl-4,5-dihydro-1h-pyrazol-3-amine hydrochloride CAS 3956-40-9
| CAS No. | 3956-40-9 |
| Molecular Formula | C4H9N3 |
| 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 135.59 g/mol gives 1-Methyl-4,5-dihydro-1h-pyrazol-3-amine hydrochloride distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies 1-Methyl-4,5-dihydro-1h-pyrazol-3-amine hydrochloride (CAS 3956-40-9), a certified reference material (molecular formula C4H9N3HCl, MW 135.59 g/mol) for analytical method development and quality control.
Owing to chlorine substitution, 1-Methyl-4,5-dihydro-1h-pyrazol-3-amine hydrochloride is typically white to off-white liquid. Its solid-state physicochemical attributes — including a molecular weight of 135.59 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.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C4H9N3 HCl |
| Molecular Weight | 135.59 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) | 1.0 |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
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Recommended Standards
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- 3-methyl-1H,2H,3H,4H-thieno[2,3-d]pyrimidine-2,4-dione (CAS 75860-86-5)
- 4-(Ethoxymethyl)-2-methylthiazole (CAS 89775-29-1)
- 1-Methyl-4-(trifluoromethyl)-1H-indazol-6-amine (CAS 1429042-91-0)
- 2-((tert-Butoxycarbonyl)(methyl)amino)-2-(4-fluorophenyl)acetic acid (CAS 1276112-08-3)
- 3-((5,6,7,8-Tetrahydronaphthalen-2-yl)oxy)propanoic acid (CAS 97024-60-7)
- 4-Chloro-5,6,7,8-tetrahydroquinazoline (CAS 1125-62-8)
- Semaglutide Impurity 143 (CAS CATO-C4X-2226143)
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