4-Amino-N-hydroxy-5-methyl-1H-pyrazole-3-carboxamide CAS 28668-24-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 28668-24-8 |
| Molecular Formula | C5H8N4O2 |
| Molecular Weight | 156.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
4-Amino-N-hydroxy-5-methyl-1H-pyrazole-3-carboxamide (CAS 28668-24-8) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C5H8N4O2. Molecular weight: 156.14 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C5H8N4O2 |
| Molecular Weight | 156.14 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| 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.) | 1965 |
| Nitrogen Atoms | 4 |
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Recommended Standards
- 4-Amino-N-hydroxy-1-methyl-1H-pyrazole-5-carboxamide (CAS 512811-21-1)
- 4-Methoxybenzene-1,2,3-triol (CAS 87997-30-6)
- 4-Amino-N-ethyl-1,2,5-oxadiazole-3-carboxamide (CAS 632291-83-9)
- Benzyl (1-oxaspiro[2.5]Octan-6-yl)carbamate (CAS 142010-03-5)
- 5-(Furan-2-ylmethylene)thiazolidine-2,4-dione (CAS 5718-88-7)
- 1-Bromo-4-(difluoromethyl)-2-(trifluoromethoxy)benzene (CAS 2167351-62-2)
- 3-(1H-Indol-2-yl)-1-(3-(trimethylammonio)propyl)pyridin-1-ium bromide (CAS 21199-46-2)
- (1r)-1-(2,3-Dihydrobenzo[b][1,4]dioxin-2-yl)ethan-1-ol (CAS 1372906-68-7)
- 1-Cyclohexyl-4-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperazine (CAS 1247001-29-1)
- Semaglutide impurity 210 (CAS CATO-C4X-2226210)
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