2-(4-tert-Butylphenyl)-7-chloro-4H-3,1-benzoxazin-4-one CAS 271775-61-2
| CAS No. | 271775-61-2 |
| Molecular Formula | C18H16ClNO2 |
| Molecular Weight | 313.78 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-(4-tert-Butylphenyl)-7-chloro-4H-3,1-benzoxazin-4-one (CAS 271775-61-2) is a high-purity analytical reference standard with the molecular formula C18H16ClNO2 and a molecular weight of 313.78 g/mol.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution, 2-(4-tert-Butylphenyl)-7-chloro-4H-3,1-benzoxazin-4-one is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 313.78 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C18H16ClNO2 |
| Molecular Weight | 313.78 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related tert Standards
- 5-(4-Tert-butylphenyl)-4-(furan-2-ylmethyl)-4h-1,2,4-triazole-3-thiol (CAS 261946-00-3)
- 4-(5-(4-Butylphenyl)pyrimidin-2-yl)benzonitrile (CAS 63617-61-8)
- N-(4-Butylphenyl)-5-methoxy-1-methyl-4-oxo-1,4-dihydropyridine-2-carboxamide (CAS 1105220-08-3)
- 4-[(4-tert-Butylphenyl)methoxy]-5-fluoroquinazoline (CAS 866009-22-5)
- 1-[(4-tert-Butylphenyl)methyl]-6-phenyl-1,2-dihydropyridin-2-one (CAS 400076-11-1)
- 4-(4-tert-Butylphenyl)-4-oxo-2-(piperidin-1-yl)butanoic acid (CAS 329078-78-6)
- N-(4-butylphenyl)-2-((4-fluorophenyl)thio)acetamide (CAS 303091-24-9)
- 5-(3-Butylphenyl)-N-cyclopentyl-2-methylpyrimidin-4-amine (CAS 917895-79-5)
Recommended Standards
- 2-(1-{[(4-chlorophenyl)methyl]amino}ethyl)-3,4-dihydroquinazolin-4-one (CAS 866009-96-3)
- 2-(Chloromethyl)-N-(4-methoxyphenyl)-N-methylquinazolin-4-amine (CAS 827031-05-0)
- 1-Isopropyl-1H-indole-2,3-dione 3-[N-(2-chlorophenyl)hydrazone] (CAS 320422-21-7)
- 2-Chloro-6-morpholino-4-(o-tolyl)nicotinonitrile (CAS 873443-68-6)
- 3,6-Bis(phenylamino)pyrazine-2,5-dione (CAS 7670-72-6)
- 2-(4-Bromophenyl)-7-oxa-1,3-diazaspiro[4.4]Non-1-en-4-one (CAS 2306268-81-3)
- 1-(2-(Pentyloxy)phenyl)ethanol (CAS 1154705-43-7)
- N,N-Diisopropyl-p-toluamide (CAS 6937-52-6)
- 2-(Ethylsulfonyl)-3,3,3-trifluoroprop-1-ene (CAS 666-71-7)
- 2-(4-Chlorophenyl)-1-oxo-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole-7-carboxylic acid (CAS 110364-97-1)
- 3-Amino-N-(tetrahydro-2-furanylmethyl)propanamidehydrochloride (CAS 1220030-32-9)
- 2-(Trifluoroacetyl)-1,2,3,4-tetrahydroisoquinoline-6-carbaldehyde (CAS 1224587-26-1)
- 2',5'-Bis(dodecyloxy)-[1,1':4',1''-terphenyl]-4,4''-dicarbaldehyde (CAS 886448-84-6)
- 141801-03-8 IL-1 Receptor Peptide (human) (CAS 141801-03-8)
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