(3-Ethanesulfonyl-2,5-dimethyl-4-oxazol-2-yl-phenyl)-(5-hydroxy-1-methyl-1H-pyrazol-4-yl)-methanone CAS 1231571-03-1
| CAS No. | 1231571-03-1 |
| Molecular Formula | C18H19N3O5S |
| Molecular Weight | 389.43 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including (3-Ethanesulfonyl-2,5-dimethyl-4-oxazol-2-yl-phenyl)-(5-hydroxy-1-methyl-1H-pyrazol-4-yl)-methanone.
(3-Ethanesulfonyl-2,5-dimethyl-4-oxazol-2-yl-phenyl)-(5-hydroxy-1-methyl-1H-pyrazol-4-yl)-methanone (CAS 1231571-03-1), molecular formula C18H19N3O5S and molecular weight 389.43 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, (3-Ethanesulfonyl-2,5-dimethyl-4-oxazol-2-yl-phenyl)-(5-hydroxy-1-methyl-1H-pyrazol-4-yl)-methanone (C18H19N3O5S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 389.43 g/mol, it falls into the moderately-high-molecular-weight range. 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.
As a certified reference material (CRM), (3-Ethanesulfonyl-2,5-dimethyl-4-oxazol-2-yl-phenyl)-(5-hydroxy-1-methyl-1H-pyrazol-4-yl)-methanone 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 | C18H19N3O5S |
| Molecular Weight | 389.43 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Ethanesulfonyl Standards
- (4-ETHANESULFONYL-2,5-DIMETHYL-3-OXAZOL-2-YL-PHENYL)-(5-HYDROXY-1-METHYL-1H-PYRAZOL-4-YL)-METHANONE (CAS 1231550-52-9)
- (3-Ethanesulfonyl-2,5-dimethyl-4-oxazol-2-yl-phenyl)-(1-ethyl-5-hydroxy-1H-pyrazol-4-yl)-methanone (CAS 1231609-13-4)
- 2-(4-Ethanesulfonyl-2-oxazol-2-yl-benzoyl)-3-hydroxy-cyclohex-2-enone (CAS 1231553-95-9)
- (4-Ethanesulfonyl-2-oxazol-2-yl-phenyl)-(1-ethyl-5-hydroxy-1H-pyrazol-4-yl)-methanone (CAS 1231624-53-5)
- 2-(3-Ethanesulfonyl-2,5-dimethyl-4-oxazol-2-yl-cyclohexa-1,5-dienecarbonyl)-3-hydroxy-cyclohex-2-enone (CAS 1231566-16-7)
- 6-(Ethanesulfonyl)-4-methanesulfonyl-N-(2-methoxyethyl)-3,4-dihydro-2H-1,4-benzoxazine-2-carboxamide (CAS 866134-43-2)
- methyl 4-({[1-(ethanesulfonyl)piperidin-4-yl]carbamoyl}amino)benzoate (CAS 1240529-44-5)
- 6-(Ethanesulfonyl)-4-(thiophene-2-sulfonyl)-3,4-dihydro-2H-1,4-benzoxazine-2-carboxylic acid (CAS 866051-07-2)
Recommended Standards
- (1-Ethyl-5-hydroxy-1H-pyrazol-4-yl)-(4-methanesulfonyl-2,5-dimethyl-3-oxazol-2-yl-phenyl)-methanone (CAS 1231565-55-1)
- (1-ETHYL-5-HYDROXY-1H-PYRAZOL-4-YL)-(3-METHANESULFONYL-2,5-DIMETHYL-4-OXAZOL-2-YL-PHENYL)-METHANONE (CAS 1231603-95-4)
- Ondansetron Impurity 13 (CAS 126671-73-6)
- Cefprozil Impurity N1(Z-Cefprozil) (CAS 121412-77-9)
- 3-bromo-5-fluoro-1H-pyrrolo[2,3-b]pyridine (CAS 1190309-71-7)
- 2-(3-Formyl-1H-indol-1-yl)-N-(4-phenoxyphenyl)acetamide (CAS 831206-96-3)
- (S)-1-(tert-Butoxycarbonyl)-2-(thiophen-3-ylmethyl)pyrrolidine-2-carboxylic acid (CAS 1217714-91-4)
- 4-Fluoro-N-(tert-pentyl)benzamide (CAS 724782-19-8)
- Palladium, bis(3-amino-2H-1-benzopyran-2-one-N)[diethylpropanedioato(2-)-O,O']-, (SP-4-2)- (CAS 79170-46-0)
- (E)-1-([1,1'-biphenyl]-4-yl)-3-(dimethylamino)prop-2-en-1-one (CAS 1202163-30-1)
- 3-Amino-2-methyl-1-(3-methylcyclohexyl)propan-1-ol (CAS 1559476-80-0)
- 1-(7-Methoxy-2h-chromen-3-yl)-ethanone (CAS 57543-55-2)
- 5-Amino-1-methyl-1H-pyrazol-3-ol (CAS 857985-10-5)
- Semaglutide impurity 101 (CAS CATO-C4X-2226101)
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