1-Bromo-2-(3-methoxyphenyl)acetylene CAS 33675-45-5
| CAS No. | 33675-45-5 |
| Molecular Formula | C9H7BrO |
| Molecular Weight | 211.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1-Bromo-2-(3-methoxyphenyl)acetylene is closely related to a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
1-Bromo-2-(3-methoxyphenyl)acetylene (CAS 33675-45-5), molecular formula C9H7BrO and molecular weight 211.06 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 1-Bromo-2-(3-methoxyphenyl)acetylene (C9H7BrO) is characterized by a hydroxyl group, an ether linkage, bromine substitution, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
As a certified reference material (CRM), 1-Bromo-2-(3-methoxyphenyl)acetylene 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 | C9H7BrO |
| Molecular Weight | 211.06 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| 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 |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1966 |
| Halogen Content | Br-containing |
Related Bromo Standards
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- 3-Bromo-4-methyl-1H-pyrrolo[3,2-c]pyridine (CAS 1000342-72-2)
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Recommended Standards
- 1-Bromo-2-(2-methoxyphenyl)acetylene (CAS 199165-20-3)
- 1-Bromo-2-(4-methoxyphenyl)acetylene (CAS 33675-41-1)
- 1-(4-Bromophenyl)prop-2-en-1-one (CAS 22731-70-0)
- 1-Bromo-2-(prop-2-yn-1-yloxy)benzene (CAS 38770-76-2)
- 4-Chloro-3-methylisoxazol-5-amine (CAS 166964-09-6)
- 4-Iodo-1-(propan-2-yl)-1h-pyrazol-3-amine (CAS 1354705-58-0)
- 2-Bromothiazolo[5,4-c]pyridine (CAS 1206250-69-2)
- 3-Chloro-4-(phenethyloxy)aniline (CAS 80019-76-7)
- Di-n-dodecyl-d25-dimethylammonium Bromide (mono-dodecyl-d25) (CAS 918897-30-0)
- 3-(Benzyloxy)-2,2-dimethyl-1-propanol (CAS 66582-32-9)
- 3-(4-Hydroxy-1H-pyrazolo[3,4-d]pyrimidin-1-yl)propanoic acid (CAS 96096-10-5)
- tert-Butyl (3-(5-(2,5-difluorophenyl)-2-phenyl-2,3-dihydro-1,3,4-thiadiazol-2-yl)propyl)carbamate (CAS 913731-98-3)
- 3-Fluoro-4-((trimethylsilyl)ethynyl)aniline (CAS 2146146-58-7)
- Insulin Degludec Impurity 2 (CAS CATO-C4X-21572)
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