5-Bromo-6-chlorobenzo[d]isoxazol-3-ol CAS 855996-71-3
| CAS No. | 855996-71-3 |
| Molecular Formula | C7H3BrClNO2 |
| Molecular Weight | 248.46 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 5-Bromo-6-chlorobenzo[d]isoxazol-3-ol.
5-Bromo-6-chlorobenzo[d]isoxazol-3-ol (CAS 855996-71-3) is a high-purity analytical reference standard with the molecular formula C7H3BrClNO2 and a molecular weight of 248.46 g/mol.
Owing to an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine/bromine substitution, an aromatic ring system, 5-Bromo-6-chlorobenzo[d]isoxazol-3-ol is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 248.46 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.
As a certified reference material (CRM), 5-Bromo-6-chlorobenzo[d]isoxazol-3-ol 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 | C7H3BrClNO2 |
| Molecular Weight | 248.46 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.) | 1987 |
| Halogen Content | Cl/Br-containing |
| Nitrogen Atoms | 1 |
Related Bromo Standards
- 6-Bromo-5-chloro-1H-imidazo[4,5-b]pyridin-2(3H)-one (CAS 1207627-28-8)
- 6-Bromo-4-chlorobenzo[d]oxazol-2(3H)-one (CAS 1226072-99-6)
- 6-Bromo-2-chloropyrrolo[2,1-f][1,2,4]triazin-4(3H)-one (CAS 1613751-15-7)
- 7-Bromo-4-chloro-1H-imidazo[4,5-c]pyridin-2(3H)-one (CAS 161836-07-3)
- 6-Bromo-5-chloropyrrolo[2,1-f][1,2,4]triazin-4(3H)-one (CAS 1703794-44-8)
- 5-Bromo-6-chloroimidazo[1,5-a]pyrazin-8-ol (CAS 1858215-47-0)
- 6-Bromo-7-chloro-1H-imidazo[4,5-b]pyridin-2(3H)-one (CAS 1936300-43-4)
- 5-Bromo-7-chloro-2,3-dihydro-1,3-benzoxazol-2-one (CAS 32272-98-3)
Recommended Standards
- 6-bromo-5-chloro-1,2-benzoxazol-3-ol (CAS 855996-74-6)
- 6-Bromo-5-chlorobenzo[d]oxazol-2(3H)-one (CAS 5579-85-1)
- 3-Bromo-5-chloropyrazolo[1,5-a]pyrimidin-6-ol (CAS CATO-C3D-5316)
- 3-bromo-4-chloro-1H-pyrazolo[3,4-d]pyrimidin-6-amine (CAS 1003298-79-0)
- 1-Bromo-4,5-dichloro-2-methoxybenzene (CAS 174913-15-6)
- 1,2,3,4-Tetramethyl-5-(trifluoromethyl)cyclopenta-1,3-diene (CAS 142701-59-5)
- 2-((4-Bromophenyl)thio)-1,1-diphenylethan-1-ol (CAS 251307-37-6)
- 2-Methyl-6-(trifluoromethyl)isonicotinic acid (CAS 1211590-99-6)
- Ethyl ((2-fluorophenyl)(1-oxo-1,2,3,4-tetrahydronaphthalen-2-yl)methyl)carbamate (CAS 478063-97-7)
- 4-Methylumbelliferyl 2-deoxy-2-sulfamino-α-D-glucopyranoside sodium salt (CAS 460085-45-4)
- Eosinophilotactic Peptide (CAS 61756-28-3)
- (R)-2-((tert-Butoxycarbonyl)(ethyl)amino)propanoic acid (CAS 101488-50-0)
- 1-[3-Chloro-5-(trifluoromethyl)pyridin-2-yl]-2-oxopyrrolidine-3-carbonitrile (CAS 400087-72-1)
- Semaglutide impurity 28 (CAS CATO-C4X-222628)
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