(7-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanol CAS 280752-79-6
| CAS No. | 280752-79-6 |
| Molecular Formula | C9H9BrO3 |
| Molecular Weight | 245.07 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.
(7-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanol (CAS 280752-79-6), molecular formula C9H9BrO3 and molecular weight 245.07 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system, (7-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanol is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 245.07 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).
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 | C9H9BrO3 |
| Molecular Weight | 245.07 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), 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; Hygroscopic; reseal immediately after opening; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Halogen Content | Br-containing |
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Recommended Standards
- (6-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methanol (CAS 280752-78-5)
- (7-Bromo-2,3-dihydrobenzo[b][1,4]dioxin-6-yl)methanol (CAS 926190-70-7)
- (4-Bromo-3-methylphenoxy)acetic acid (CAS 90971-89-4)
- (E)-5-bromo-1-(but-2-en-1-yl)pyrimidine-2,4(1H,3H)-dione (CAS 950581-48-3)
- 5,6-dichloro-2,3-dihydro-1H-isoindol-1-one (CAS 110568-67-7)
- 1-(6-(Trifluoromethyl)pyridin-3-yl)cyclopropane-1-carbonitrile (CAS 1427012-06-3)
- Sodium dihydrogen phosphate dihydrate dihydrate (CAS 13472-35-0)
- N-Benzyl-2-imino-10-methyl-5-oxo-1-propyl-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide (CAS 510762-16-0)
- Azetidine-3-ethanol (CAS 752956-75-5)
- Azilsartan Impurity 23 (CAS 136285-65-9)
- (3-(1-Methyl-1H-imidazol-2-yl)phenyl)boronic acid (CAS 1404466-88-1)
- Glycerol Impurity 13 (CAS CATO-C4X-217113)
- PC61BM (CAS 160848-21-5)
- (Des-Thr?)-Glucagon trifluoroacetate salt (CAS 1802078-27-8)
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