2,5-Dihydro-1H-pyrazol-3-amine sulfate CAS 5179-17-9
| CAS No. | 5179-17-9 |
| Molecular Formula | H2O4S |
| 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 183.18 g/mol gives 2,5-Dihydro-1H-pyrazol-3-amine sulfate distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
2,5-Dihydro-1H-pyrazol-3-amine sulfate (CAS 5179-17-9), molecular formula H2O4SC3H7N3 and molecular weight 183.18 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to an amide group, a sulfone group, a carboxylic acid group, an ether linkage, 2,5-Dihydro-1H-pyrazol-3-amine sulfate is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 183.18 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 | H2O4S C3H7N3 |
| Molecular Weight | 183.18 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 1.0 |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Dihydro Standards
- 3-(3,6-Dihydro-2h-pyran-4-yl)benzoic acid (CAS 1000016-95-4)
- 1,7-Dihydro-dipyrrolo[2,3-b:3',2'-e]pyridine (CAS 1000342-79-9)
- Methyl 9,10-Dihydro-9-oxoacridine-4-carboxylate (CAS 100039-03-0)
- 3-(3,4-Dihydro-2h-benzo[b][1,4]dioxepin-7-yl)propan-1-ol (CAS 1000540-71-5)
- 2,5-Dihydro-1-(2-nitrophenyl)-5-oxo-1H-1,2,4-triazole-3-carboxylic acid dimethylamide (CAS 1000574-24-2)
- 5-(1,2-Dihydro-[1,1':4',1''-terphenyl]-2-yl)-3H-1,2,4-triazol-3-one (CAS 1000575-71-2)
- Ethyl 2,5-dihydro-5-oxo-1-[3-(trifluoromethyl)phenyl]-1H-1,2,4-triazole-3-carboxylate (CAS 1000576-65-7)
- 2,5-Dihydro-5-oxo-1-phenyl-1H-1,2,4-triazole-3-carboxylic acid (2-chlorophenyl)amide (CAS 1000576-93-1)
Recommended Standards
- 7-Chloro-N-isopropylquinolin-4-amine (CAS 1036623-49-0)
- Amlodipine Hydrobromide - API Standards (CAS 246852-09-5)
- Decarbazolyl Carvedilol (CAS 10461-27-5)
- 4-(Benzyl(methyl)amino)-3,5-difluorobenzoic acid (CAS 1404196-20-8)
- 7-Bromo-1,2,3,4-tetrahydrocyclopenta[b]indole (CAS 164736-47-4)
- 3-(4-Butylphenyl)-1H-pyrazol-5-amine hydrochloride (CAS 1031793-88-0)
- (5-(1-Methyl-1H-pyrazol-4-yl)pyrimidin-2-yl)methanamine (CAS 1404364-81-3)
- 3-Bromo-1-phenylpropan-1-one (CAS 29636-75-7)
- n-(4-Fluorophenyl)-2-sulfanylacetamide (CAS 70453-50-8)
- Liraglutide Impurity 30 (CAS CATO-C4X-199230)
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