5,6-Dichlorobenzo[d]oxazol-2(3H)-one CAS 5285-41-6
| CAS No. | 5285-41-6 |
| Molecular Formula | C7H3Cl2NO2 |
| Molecular Weight | 204.01 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 5,6-Dichlorobenzo[d]oxazol-2(3H)-one 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.
5,6-Dichlorobenzo[d]oxazol-2(3H)-one (CAS 5285-41-6) is a high-purity analytical reference standard with the molecular formula C7H3Cl2NO2 and a molecular weight of 204.01 g/mol.
The molecular framework of 5,6-Dichlorobenzo[d]oxazol-2(3H)-one (C7H3Cl2NO2) is characterized by an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
Physical & Chemical Properties
| Molecular Formula | C7H3Cl2NO2 |
| Molecular Weight | 204.01 g/mol |
| Appearance | Off-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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Dichlorobenzo Standards
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- 5,7-Dichlorobenzo[d]isoxazol-3(2H)-one (CAS 66571-27-5)
- 5,7-Dichlorobenzo[d]oxazol-2(3H)-one (CAS 19932-89-9)
- 5,6-Dichlorobenzo[d]thiazole, 97% (CAS 118220-70-5)
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Recommended Standards
- 5,6-Dichloro-1H,2H,3H-imidazo[4,5-b]pyridin-2-one (CAS 361365-08-4)
- 5,6-dichloro-1,2-benzoxazol-3-ol (CAS 855996-73-5)
- 4,6-Dichloro-2-methoxypyrimidine-5-carbonitrile (CAS 56032-15-6)
- 4,5-Dichloro-2,3-dihydroxybenzonitrile (CAS 73275-91-9)
- 2-Chloro-6-(3,5-dimethoxyphenyl)-4-methylnicotinonitrile (CAS 1956341-53-9)
- methyl (1R,4S)-4-(2,5-dimethyl-1H-pyrrol-1-yl)cyclopent-2-ene-1-carboxylate (CAS 851916-44-4)
- 1-(4-(Trifluoromethyl)phenyl)homopiperazine (CAS 868063-79-0)
- 5-Hydroxy-7-methoxy-2,2-dimethylchroman-4-one (CAS 1019-60-9)
- 9-Cyclopentyl-9H-purin-6-amine (CAS 715-91-3)
- 1-Methyl-4-nitro-1H-imidazole-5-carbaldehyde (CAS 85012-73-3)
- 4-chloro-6,7-diethoxyquinoline (CAS 767225-24-1)
- 2-(2-Bromo-5-cyano-3-(difluoromethyl)pyridin-4-yl)acetic acid (CAS 1805388-30-0)
- (2R,3R,4S,5R)-2-(2-Decyl-6-hydroxy-9H-purin-9-yl)-5-(hydroxymethyl)tetrahydrofuran-3,4-diol (CAS 88868-66-0)
- Exenatide (CAS 141758-74-9（free base）)
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