4-(2-Hydroxyethyl)-5-methyl-1H-pyrazol-3-ol CAS 65287-96-9
| CAS No. | 65287-96-9 |
| Molecular Formula | C6H10N2O2 |
| Molecular Weight | 142.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-(2-Hydroxyethyl)-5-methyl-1H-pyrazol-3-ol (CAS 65287-96-9), molecular formula C6H10N2O2 and molecular weight 142.16 g/mol, is a CATO reference standard with documented purity and traceability.
4-(2-Hydroxyethyl)-5-methyl-1H-pyrazol-3-ol (C6H10N2O2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
As a certified reference material (CRM), 4-(2-Hydroxyethyl)-5-methyl-1H-pyrazol-3-ol 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 | C6H10N2O2 |
| Molecular Weight | 142.16 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1975 |
| Nitrogen Atoms | 2 |
Related Hydroxyethyl Standards
- 2-(2-Hydroxyethyl)-5-methyl-2,4-dihydro-3H-pyrazol-3-one (CAS 56226-25-6)
- 4-(2-Hydroxyethyl)-3-methyl-2-pyrazolin-5-one (CAS 7721-54-2)
- 2-(2-Hydroxyethyl)cyclohexan-1-one (CAS 10198-27-3)
- 3-(2-Hydroxyethyl)cyclohexan-1-one (CAS 5502-11-4)
- 4-(2-hydroxyethyl)cyclohexan-1-one (CAS 32863-01-7)
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- 3-(1-Hydroxyethyl)-4-methyl-1H-1,2,4-triazol-5(4H)-one (CAS 1446487-94-0)
Recommended Standards
- 4-(3-Aminopropyl)-4,5-dihydro-1,2-oxazol-5-one (CAS 25055-43-0)
- 4-(2-Aminoethyl)-5-methylisoxazol-3(2H)-one (CAS 58728-68-0)
- 4-(Hydrazinylmethylene)-2-methyldihydrofuran-3(2H)-one (CAS 648408-61-1)
- 4-(2-Aminoethyl)-3-methylisoxazol-5(2H)-one (CAS 952958-72-4)
- 3-(Boc-amino)-1-Cbz-pyrrolidine (CAS 185057-49-2)
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- 1,4-Dihydro-1,4-methanonaphthalen-5-amine (CAS 61346-80-3)
- (2,6-Difluoropyridin-3-yl)(phenyl)methanone (CAS 1158955-21-5)
- 4,5-Dichloro-1,2,3,6-tetrahydropyridine (CAS 1432680-16-4)
- Nalmefene Impurity 26 (CAS CATO-C4X-126826)
- 2-Methyl-2-pentanethiol (CAS 1633-97-2)
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