1-Acetyl-3-amino-1H-pyrazol-5(4H)-one CAS 129027-73-2
| CAS No. | 129027-73-2 |
| Molecular Formula | C5H7N3O2 |
| Molecular Weight | 141.13 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-Acetyl-3-amino-1H-pyrazol-5(4H)-one (CAS 129027-73-2), molecular formula C5H7N3O2 and molecular weight 141.13 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, 1-Acetyl-3-amino-1H-pyrazol-5(4H)-one (C5H7N3O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 141.13 g/mol, it falls into the low-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
As a certified reference material (CRM), 1-Acetyl-3-amino-1H-pyrazol-5(4H)-one 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 | C5H7N3O2 |
| Molecular Weight | 141.13 g/mol |
| Purity | 97%+ |
| 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) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1993 |
| Nitrogen Atoms | 3 |
Related Acetyl Standards
- 2-(3-Amino-1H-pyrazol-1-yl)acetic acid (CAS 1006319-29-4)
- 4-Amino-1-methylpyrazole-3-carboxylic Acid (CAS 1006334-34-4)
- 2-(4-Amino-1H-pyrazol-1-yl)acetic acid (CAS 1006348-46-4)
- 5-Amino-N-methyl-1H-1,2,4-triazole-3-carboxamide (CAS 1019126-62-5)
- 4-Amino-1H-pyrazole-3-carbohydrazide (CAS 1026783-39-0)
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Recommended Standards
- 2-(5-Amino-1H-1,2,4-triazol-3-yl)acetamide (CAS 1279219-08-7)
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- 4-(2-Oxopropyl)-1H-1,2,3-triazol-5(2H)-one (CAS 127846-79-1)
- Methyl 3-amino-1H-pyrazole-5-carboxylate (CAS 1312929-42-2)
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