2-(tert-Butyl)-5-chloro-6-nitrobenzo[d]oxazole CAS 102405-54-9
| CAS No. | 102405-54-9 |
| Molecular Formula | C11H11ClN2O3 |
| Molecular Weight | 254.67 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 2-(tert-Butyl)-5-chloro-6-nitrobenzo[d]oxazole.
2-(tert-Butyl)-5-chloro-6-nitrobenzo[d]oxazole (CAS 102405-54-9), molecular formula C11H11ClN2O3 and molecular weight 254.67 g/mol, is a CATO reference standard with documented purity and traceability.
2-(tert-Butyl)-5-chloro-6-nitrobenzo[d]oxazole (C11H11ClN2O3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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).
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.
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 | C11H11ClN2O3 |
| Molecular Weight | 254.67 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Recommended Standards
- 5-Chloro-N-(cyclopropylmethyl)-2-nitrobenzamide (CAS 1016681-35-8)
- 1-(5-chloro-2-methoxy-phenyl)hexahydropyrimidine-2,4-dione (CAS 1062554-68-0)
- 2-Chloro-5-[[2-(nitromethylidene)imidazolidin-1-yl]methyl]pyridine (CAS 101336-63-4)
- 1-(3-chloro-4-methoxy-phenyl)hexahydropyrimidine-2,4-dione (CAS 1062554-70-4)
- 5-Hydroxy Salbutamol Acetate (CAS 182676-90-0(Free Base))
- 2-(tert-Butyl)-4-chloro-5-methoxypyridazin-3(2H)-one (CAS 331858-20-9)
- 6-Methyl-2-((4-nitrobenzyl)thio)pyrimidin-4(1H)-one (CAS 78932-25-9)
- Tomerzol (CAS 135048-68-9)
- (S)-Tetrahydrofuran-3-carbaldehyde (CAS 374082-39-0)
- 4-(2-Fluorophenyl)-2-hydrazinylthiazole (CAS 886495-23-4)
- 1H-1,2,3-Triazole-4-carboxylic acid, 1-(4-chlorophenyl)-5-[(triphenylphosphoranylidene)amino]-, ethyl ester (CAS 272123-45-2)
- 2-(Phenylthio)acetamide (CAS 22446-20-4)
- 702670-43-7 1-(2-Chlorobenzyl)-1H-pyrrole-2-carboxylic acid MFCD03830373 (CAS 702670-43-7)
- Semaglutide impurity 86 (CAS CATO-C4X-152686)
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