5-Methyl-4-phenyloxazole-2-carbohydrazide CAS 33123-86-3
| CAS No. | 33123-86-3 |
| Molecular Formula | C11H11N3O2 |
| Molecular Weight | 217.22 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 5-Methyl-4-phenyloxazole-2-carbohydrazide 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.
5-Methyl-4-phenyloxazole-2-carbohydrazide (CAS 33123-86-3), molecular formula C11H11N3O2 and molecular weight 217.22 g/mol, is a CATO reference standard with documented purity and traceability.
5-Methyl-4-phenyloxazole-2-carbohydrazide (C11H11N3O2) 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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), 5-Methyl-4-phenyloxazole-2-carbohydrazide 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 | C11H11N3O2 |
| Molecular Weight | 217.22 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.) | 1966 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- 5-Methyl-2-phenyloxazole-4-carboxylic Acid Methyl Ester (CAS 100063-41-0)
- Ethyl 5-Phenyloxazole-2-carboxylate (CAS 13575-16-1)
- Ethyl 2-phenyloxazole-4-carboxylate (CAS 39819-39-1)
- Ethyl 2-phenyloxazole-5-carboxylate (CAS 39819-40-4)
- 5-phenyloxazole-4-carbonyl chloride (CAS 337508-64-2)
- 4-Methyl-2-phenyloxazole-5-carbonyl chloride (CAS 52169-89-8)
- 2-Phenyloxazole-4-carbonyl chloride (CAS 1204-70-2)
- 2-(5-Methyl-2-phenyloxazole-4-yl)ethanol (CAS 103788-65-4)
Recommended Standards
- 5-Methyl-3-(o-tolyl)isoxazole-4-carboxylic Acid (CAS 91569-58-3)
- 5-Methyl-N-(pyridin-2-ylmethyl)isoxazole-3-carboxamide (CAS 830343-83-4)
- 5-Methyl-3-(4-methylphenyl)-1,2-oxazole-4-carboxylic acid (CAS 91569-59-4)
- 5-Phenethylisoxazole-4-carboxylic acid (CAS 954230-22-9)
- 2-(2-(2-(2-(2-(2-Hydroxyethoxy)ethoxy)ethoxy)phenoxy)ethoxy)ethanol (CAS 501892-05-3)
- 4-(4-Ethylphenyl)-3,4-dihydrofuro[3,4-d]pyrimidine-2,5(1H,7H)-dione (CAS 1707603-59-5)
- 2-(2-methoxyphenyl)quinoline-4-carboxylic acid (CAS 181048-49-7)
- 2-Benzyl-1-(2,2-dimethyl-8,8α-dihydro-3α,H-indeno[1,2-d]oxazol-3yl)-3-oxiranyl-propan-1-one (CAS 158512-24-4)
- 2-(2-(2-Bromo-4-chlorophenoxy)ethyl)-1,3-dioxolane (CAS 1443355-15-4)
- 2-Bromo-1-(2-bromothiazol-4-yl)ethan-1-one (CAS 1824314-86-4)
- (1S,4R)-2,5-diazabicyclo[2.2.1]Heptane-1-carboxylic acid dihydrochloride (CAS 1485424-72-3)
- 2,7-Dimethyltetralin (CAS 13065-07-1)
- trans-[1,3'-bipyrrolidin]-4'-ol (CAS 960289-59-2)
- C-Peptide (human) (CAS 33017-11-7)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com