4-(Hydroxymethylene)-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one CAS 4702-79-8
| CAS No. | 4702-79-8 |
| Molecular Formula | C11H10N2O2 |
| Molecular Weight | 202.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 4-(Hydroxymethylene)-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one is closely related to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
CATO supplies 4-(Hydroxymethylene)-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one (CAS 4702-79-8), a certified reference material (molecular formula C11H10N2O2, MW 202.21 g/mol) for analytical method development and quality control.
The molecular framework of 4-(Hydroxymethylene)-3-methyl-1-phenyl-1H-pyrazol-5(4H)-one (C11H10N2O2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
As a certified reference material (CRM), 4-(Hydroxymethylene)-3-methyl-1-phenyl-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 | C11H10N2O2 |
| Molecular Weight | 202.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Nitrogen Atoms | 2 |
Related Hydroxymethylene Standards
- 2-Benzyl-4-(hydroxymethylene)oxazol-5(4H)-one (CAS 332095-91-7)
- 3-(Hydroxymethylene)-7-methoxyindolin-2-one (CAS 1018523-45-9)
- 3-(Hydroxymethylene)-5-methoxyindolin-2-one (CAS 1018549-00-2)
- 3-(Hydroxymethylene)-6-methoxyindolin-2-one (CAS 1824813-94-6)
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- 4-(Hydroxymethylene)-2-phenyloxazol-5(4H)-one (CAS 65037-88-9)
Recommended Standards
- 4-(Hydroxymethyl)-5-(phenylamino)-2H-pyrrol-2-one (CAS 55876-73-8)
- 4,4A,7,7a-tetrahydro-4,7-ethenocyclobuta[f]isobenzofuran-1,3(3aH,6aH)-dione (CAS 4602-96-4)
- 4-(Hydroxymethyl)-2-naphthoic acid (CAS 79996-85-3)
- 4,6-dimethyl pyrimidine-4,6-dicarboxylate (CAS 6345-43-3)
- 2-{3-oxo-2h,3h,5h,6h,7h,8h-[1,2,4]triazolo[4,3-a]pyridin-2-yl}acetic acid (CAS 1406928-10-6)
- 1-(2-Iodo-4-methoxyphenyl)ethan-1-one (CAS 90347-63-0)
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