4-Aminopyrazole Hydrochloride CAS 4331-28-6
| CAS No. | 4331-28-6 |
| Molecular Formula | C3H5N3 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 4-Aminopyrazole Hydrochloride.
4-Aminopyrazole Hydrochloride (CAS 4331-28-6) is a high-purity analytical reference standard with the molecular formula C3H5N3HCl and a molecular weight of 119.55 g/mol.
Structurally, 4-Aminopyrazole Hydrochloride (C3H5N3HCl) contains a nitrile group, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 2.0, corresponding to approximately 2 ring(s) or double-bond equivalent(s). With a molecular weight of 119.55 g/mol, it falls into the low-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-Aminopyrazole Hydrochloride 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 | C3H5N3 HCl |
| Molecular Weight | 119.55 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.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Aminopyrazole Standards
- 4-Aminopyrazole Dihydrochloride (CAS 103286-58-4)
- 4-Aminopyrazole-3-carboxylic Acid (CAS 116008-52-7)
- 5-Aminopyrazole-3-carboxamide (CAS 1219743-26-6)
- 5-Aminopyrazole-3-carbonitrile (CAS 125144-04-9)
- 3-Aminopyrazole-4-nitrile (CAS 16617-46-2)
- 3-Aminopyrazole (CAS 1820-80-0)
- 4-Aminopyrazole (CAS 28466-26-4)
- Methyl 3-Aminopyrazole-4-carboxylate (CAS 29097-00-5)
Recommended Standards
- Ethyl 4-amino-1H-pyrazole-5-carboxylate hydrochloride (CAS 55904-61-5)
- 3-(4-Fluorobenzyl)-1-methylpiperidin-4-amine hydrochloride (CAS 1822842-15-8)
- (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(2-methoxyphenyl)propanoic acid (CAS 206060-41-5)
- N-((1H-benzo[d][1,2,3]triazol-1-yl)methyl)-2,5-difluoroaniline (CAS 256955-21-2)
- (3-((Cyclohexyloxy)methyl)phenyl)boronic acid (CAS 1256358-64-1)
- Ethyl 4-(5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)piperazine-1-carboxylate (CAS 1073354-26-3)
- Ethyl {[4-(difluoromethoxy)-phenyl]carbamoyl}formate (CAS 87967-35-9)
- tert-Butyl 3-morpholinopyrrolidine-1-carboxylate (CAS 1184914-30-4)
- N-(6-Methyl-4-oxochroman-3-yl)acetamide (CAS 54444-48-3)
- Palmitoyl Tripeptide-8 TFA salt (CAS 936544-53-5)
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