5-Amino-1-nitroso-1H-pyrazole-4-carboxamide CAS CATO-C3D-26212
| CAS No. | CATO-C3D-26212 |
| Molecular Formula | C4H5N5O2 |
| Molecular Weight | 155.11 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 155.11 g/mol gives 5-Amino-1-nitroso-1H-pyrazole-4-carboxamide distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
5-Amino-1-nitroso-1H-pyrazole-4-carboxamide (CAS CATO-C3D-26212), molecular formula C4H5N5O2 and molecular weight 155.11 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C4H5N5O2, 5-Amino-1-nitroso-1H-pyrazole-4-carboxamide contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 155.11 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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 | C4H5N5O2 |
| Molecular Weight | 155.11 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Nitrogen Atoms | 5 |
Related Amino Standards
- 2-Amino-3-nitropyridin-4-ol (CAS 1201681-64-2)
- 6-Amino-2-oxo-1,2-dihydropyrimidine-4-carboxylic acid (CAS 16490-05-4)
- 6-Amino-3-nitropyridin-2-ol (CAS 183008-11-9)
- 3-Amino-4-nitropyridine 1-oxide (CAS 19349-78-1)
- 6-Amino-5-nitro-pyridin-3-ol (CAS 1935948-86-9)
- 2-Amino-5-nitropyridin-3-ol (CAS 908248-27-1)
- 2-Amino-6-oxo-1,6-dihydropyrimidine-4-carboxylic acid (CAS 6973-52-0)
- 2-Amino-6-oxo-1,6-dihydropyrimidine-5-carboxylic acid (CAS 40769-70-8)
Recommended Standards
- 2-hydroxy-4-amino-5-nitropyridine 4-Amino-5-nitro-2-pyridinol 4-amino-5-nitropyridin-2-ol 99479-77-3 (CAS 99479-77-3)
- Famotidine impurity 70 (CAS 874285-13-9)
- Picene-5,6-dione (CAS 24743-25-7)
- Sepiapterin Impurity 21 (CAS 62128-61-4)
- Tert-butyl 4-(tert-butyl)-3-hydroxypiperidine-1-carboxylate (CAS 1188265-71-5)
- 2-Bromo-7-nitronaphthalene (CAS 102153-46-8)
- n-(Cyclopropylmethyl)-3-methoxyaniline (CAS 356539-55-4)
- N-(1-(Pyrazin-2-yl)ethyl)cyclopropanamine (CAS 1185542-82-8)
- 2-Methyl-3-(2,3,5,6-tetramethylphenyl)-1-propene (CAS 14611-46-2)
- n-(3-(Tert-butyl)-1h-pyrazol-5-yl)cyclopentanecarboxamide (CAS 84958-91-8)
- DroMetrizole Trisiloxane (CAS 155633-54-8)
- tert-Butyl (4S)-2-amino-4-(propan-2-yl)-4H,5H,6H-pyrrolo[3,4-d][1,3]thiazole-5-carboxylate (CAS 1637310-38-3)
- 4-Amino-2-methylbenzonitrile (CAS 72115-06-1)
- D-[Thr]7-Liraglutide (CAS CATO-C4X-199237)
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