2,4-dichloro-1,3-benzoxazole CAS 656836-87-2
| CAS No. | 656836-87-2 |
| Molecular Formula | C7H9Cl2NO |
| Molecular Weight | 194.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
2,4-dichloro-1,3-benzoxazole (CAS 656836-87-2) is a high-purity analytical reference standard with the molecular formula C7H9Cl2NO and a molecular weight of 194.06 g/mol.
2,4-dichloro-1,3-benzoxazole (C7H9Cl2NO) contains an amide group, a hydroxyl group, an ether linkage, chlorine substitution. Halogen substitution raises its density and boiling point; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a certified reference material (CRM), 2,4-dichloro-1,3-benzoxazole 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 | C7H9Cl2NO |
| Molecular Weight | 194.06 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor, faint amine-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related dichloro Standards
- 1-(4,5-Dichloro-1-methyl-1H-pyrazol-3-yl)-N-methylmethanamine (CAS 1006485-34-2)
- 2,4-dichloro-1-isocyanato-benzene (CAS 2612-57-9)
- 3,5-Dichloro-4-(methylthio)pyridine (CAS 1289269-02-8)
- 2,5-Dichloro-3-(methylthio)pyridine (CAS 1416713-50-2)
- 2,6-Dichloro-3-(methylthio)pyridine (CAS 1428234-50-7)
- 2,6-Dichloro-4-(methylthio)pyridine (CAS 153564-25-1)
- 2,4-Dichloro-6-(methylthio)pyridine (CAS 86634-72-2)
- 2,5-Dichloro-4-(methylthio)pyridine (CAS 474824-43-6)
Recommended Standards
- 2-(4,6-dichloropyrimidin-2-yl)acetonitrile (CAS 63155-43-1)
- (3-(Allylthio)phenyl)boronic acid (CAS 915401-98-8)
- 3-(Cyclopropylthio)phenylboronic acid (CAS 2055662-25-2)
- (2,2,2-Trifluoroethoxy)difluoroacetic Acid (CAS 152538-73-3)
- 5-(3-Chloro-4-((5-(trifluoromethyl)pyridin-2-yl)oxy)phenyl)-5H-thieno[2,3-c]pyrrole (CAS 400079-22-3)
- 4-(Methylthio)benzyl Alcohol (CAS 3446-90-0)
- 3,6-Difluoro-2-iodopyridine (CAS 1214350-80-7)
- 5-Fluoro-2-(piperidin-4-ylmethyl)isoindolin-1-one hydrochloride (CAS 359629-72-4)
- 2-(4-(Tert-butoxycarbonyl)piperazin-1-yl)-2-(4-cyanophenyl)acetic acid (CAS 885274-36-2)
- n-Benzyl-n-methylaminosulfonamide (CAS 15205-37-5)
- Prednisone Impurity 29 (20(R)-Hydroxy Methylprednisolone) (CAS 387-65-5)
- Heptane derivatives 1-5 HCl (CAS CATO-C4X-22655)
- 1-[(2-Chlorophenyl)methyl]piperazine (CAS 17532-19-3)
- Ephrin-A2-Selective YSA-Peptide (CAS 532441-10-4)
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