1,3-Dibromo-5-methoxybenzene CAS 74137-36-3
| CAS No. | 74137-36-3 |
| Molecular Formula | C7H6Br2O |
| Molecular Weight | 265.93 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), 1,3-Dibromo-5-methoxybenzene 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.
1,3-Dibromo-5-methoxybenzene (CAS 74137-36-3), molecular formula C7H6Br2O and molecular weight 265.93 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C7H6Br2O, 1,3-Dibromo-5-methoxybenzene contains a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 265.93 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C7H6Br2O |
| Molecular Weight | 265.93 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| 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 |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Halogen Content | Br-containing |
Related Dibromo Standards
- 2,6-Dibromo-3-methylphenol (CAS 100477-79-0)
- 2,5-Dibromo-3,6-dimethylpyrazine, 96% (CAS 121594-49-8)
- 5,6-Dibromo-2-methylpyridin-3-amine (CAS 1227628-71-8)
- 4,6-Dibromo-2-methylpyridin-3-amine (CAS 126325-49-3)
- 2,6-Dibromo-5-methylpyridin-3-amine (CAS 126325-51-7)
- 3,5-Dibromo-2-methylpyridin-4-amine (CAS 126325-54-0)
- 4,5-Dibromo-2-cyclopropyl-1H-imidazole (CAS 1269233-20-6)
- 3,5-Dibromo-4-methylphenol (CAS 13979-81-2)
Recommended Standards
- 4,6-Dibromobenzene-1,3-diamine (CAS 36210-57-8)
- 2,5-Dibromoanisole (CAS 95970-08-4)
- 4,5-Dibromobenzene-1,2-diamine (CAS 49764-63-8)
- 1,2-Dibromo-2,4-Dicyanobutane (CAS 35691-65-7)
- 1,6,7-Trimethyl-3-pentyloxazolo[2,3-f]purine-2,4(1H,3H)-dione (CAS 899997-36-5)
- 5-(Thiophen-2-yl)-1H-indazole (CAS 885272-39-9)
- tert-Butyl 3-(2,6-difluorobenzyl)piperazine-1-carboxylate (CAS 886775-57-1)
- 3-Ethynyl-3-methylazetidine 2,2,2-trifluoroacetate (CAS 2231676-17-6)
- 1-Butyl-N-ethyl-6-oxo-1,6-dihydropyridazine-3-carboxamide (CAS 1223512-72-8)
- 2-(1,2,3,6,7,8-Hexahydro-as-indacen-4-yl)acetic acid (CAS 2420508-27-4)
- (4-Methoxy-3,5-dimethylbenzyl)amine (CAS 1039927-88-2)
- 1-(4-Iodophenyl)butan-1-one (CAS 160565-77-5)
- Norepinephrine Impurity 98 (CAS CATO-C4X-151498)
- Semaglutide impurity 104(Fmoc-D-His-Aib) (CAS 2171211-18-8)
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