Methyl 6-Bromo-2,6-dideoxy-α-D-ribo-hexopyranoside Dibenzoate CAS 18933-67-0
| CAS No. | 18933-67-0 |
| Molecular Formula | C21H21BrO6 |
| Molecular Weight | 449.29 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.
Methyl 6-Bromo-2,6-dideoxy-α-D-ribo-hexopyranoside Dibenzoate (CAS 18933-67-0), molecular formula C21H21BrO6 and molecular weight 449.29 g/mol, is a CATO reference standard with documented purity and traceability.
Structurally, Methyl 6-Bromo-2,6-dideoxy-α-D-ribo-hexopyranoside Dibenzoate (C21H21BrO6) contains a flavonoid core, a hydroxyl group, an ether linkage, bromine substitution. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 449.29 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C21H21BrO6 |
| Molecular Weight | 449.29 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1962 |
| Halogen Content | Br-containing |
Related Methyl Standards
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Recommended Standards
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- 2-(3-Chloro-2-methylphenyl)-4-(3-(3-chlorophenyl)-1,2,4-oxadiazol-5-yl)phthalazin-1(2H)-one (CAS 478045-84-0)
- 3-Amino-6-(2-chlorophenyl)-4-(3,4-dimethoxyphenyl)thieno[2,3-b]pyridine-2-carboxamide (CAS 690642-63-8)
- Ethyl 1-ethyl-3-(piperidin-1-ylsulfonyl)-1H-pyrazole-4-carboxylate (CAS 1260912-39-7)
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- 3,5-Dimethyl-N-(5-methyl-1,3,4-thiadiazol-2-yl)benzofuran-2-carboxamide (CAS 620586-15-4)
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