1-(5-(tert-Butyl)isoxazol-3-yl)-1-methylurea CAS 55861-83-1
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 55861-83-1 |
| Molecular Formula | C16H23N3O2S |
| Molecular Weight | 321.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1-(5-(tert-Butyl)isoxazol-3-yl)-1-methylurea (CAS 55861-83-1) is a high-purity pharmaceutical standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C16H23N3O2S. Molecular weight: 321.44 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C16H23N3O2S |
| Molecular Weight | 321.44 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Recommended Standards
- 1-(4-Isopropylphenyl)-2-(tetrahydro-2H-pyran-4-carbonyl)hydrazine-1-carbothioamide (CAS 1980040-32-1)
- 2-{2-[4-(tert-Butyl)phenyl]hydrazono}-2-(tert-butylsulfonyl)acetonitrile (CAS 241127-22-0)
- (R)-1-(1-(1H-Imidazol-5-yl)propan-2-yl)-3-(2-(((4-methyl-1H-imidazol-5-yl)methyl)thio)ethyl)guanidine (CAS 79313-75-0)
- (R)-N-[2-(4-Aminophenyl)propyl]propane-2-sulfonamide (CAS 376594-64-8)
- N-(5-Methylisoxazol-3-yl)-2,3-dihydrobenzo[b][1,4]dioxine-2-carboxamide (CAS 681170-13-8)
- Gold(III) chloride (CAS 13453-07-1)
- 2'-(Pyrrolidine-3-carbonyl)-[1,1'-biphenyl]-4-carboxylic acid (CAS 1261998-00-8)
- 4-Hydroxy-3-methoxy-5-methylbenzaldehyde (CAS 32263-14-2)
- Mirtazapine Cyano Impurity (Oxalate salt) (CAS 331815-15-7)
- Semaglutide impurity 31 (CAS CATO-C4X-222631)
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 13829788188 / jacky.chen@cato-chem.com