7-bromo-3,4-dihydro-1H-2-benzopyran-4-one CAS 168759-64-6
| CAS No. | 168759-64-6 |
| Molecular Formula | C9H13BrO2 |
| Molecular Weight | 233.10 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies 7-bromo-3,4-dihydro-1H-2-benzopyran-4-one (CAS 168759-64-6), a certified reference material (molecular formula C9H13BrO2, MW 233.10 g/mol) for analytical method development and quality control.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, 7-bromo-3,4-dihydro-1H-2-benzopyran-4-one is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 233.10 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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 | C9H13BrO2 |
| Molecular Weight | 233.10 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2005 |
| Halogen Content | Br-containing |
Related bromo Standards
- 2-Bromo-7-vinylnaphthalene (CAS 1219691-16-3)
- 2-Bromo-3-(cyclohexyloxy)acrylaldehyde (CAS 1253298-70-2)
- 5-bromo-4-methyl-1,3-dihydro-2-benzofuran-1-one (CAS 1255206-67-7)
- Ethyl 4-Bromo-3-cyclohexenecarboxylate (CAS 1365272-96-3)
- 5-bromo-3-methyl-3H-isobenzofuran-1-one (CAS 1374574-45-4)
- 5-bromo-3,4-dihydro-2H-1-benzopyran-2-one (CAS 1637490-76-6)
- 3-Bromo-2-hydroxy-4,4,5,5-tetramethylcyclopent-2-en-1-one (CAS 1889-99-2)
- 1-Bromo-4-methoxybicyclo[2.2.2]octan-2-one (CAS 88888-28-2)
Recommended Standards
- 5-bromobenzofuran-7-carbaldehyde (CAS 170681-94-4)
- Methyl4-bromobicyclo[2.2.1]heptane-1-carboxylate (CAS 15448-84-7)
- 2,4-Dichloro-6-(piperidin-1-yl)-1,3,5-triazine (CAS 19371-31-4)
- (1-Aminobutane-1,1-diyl)bis(phosphonic acid) (CAS 32545-60-1)
- 1-Allyl-3-ethoxybenzene (CAS 865719-00-2)
- Ethyl 4-((benzyloxy)methyl)-2-(tetrahydro-2H-pyran-4-yl)-1H-imidazole-5-carboxylate (CAS 1245649-48-2)
- 1-(4'-Propyl-[1,1'-biphenyl]-4-yl)ethan-1-one (CAS 60137-92-0)
- 1-Bromocyclohexane-1-carboxylic acid (CAS 55106-53-1)
- N-(3-Chlorophenyl)-2-({3-ethyl-4-oxo-7-phenyl-3H,4H-thieno[3,2-d]pyrimidin-2-yl}sulfanyl)acetamide (CAS 1040683-06-4)
- N-{[2-chloro-6-(1H-pyrrol-1-yl)phenyl]methyl}propanamide (CAS 866042-72-0)
- 2-(3-Bromo-5-chloro-2,6-difluorophenyl)acetic acid (CAS 2514730-19-7)
- 2,6-Difluoro-4-isopropoxybenzoic acid (CAS 1993479-26-7)
- Roflumilast USP Related Compound E (CAS 3031785-18-6)
- Semaglutide impurity 87 (CAS CATO-C4X-222687)
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