1-(Bromomethyl)-2-ethynylbenzene CAS 211508-95-1
| CAS No. | 211508-95-1 |
| Molecular Formula | C9H7Br |
| Molecular Weight | 195.06 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1-(Bromomethyl)-2-ethynylbenzene is closely related to bromine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
1-(Bromomethyl)-2-ethynylbenzene (CAS 211508-95-1), molecular formula C9H7Br and molecular weight 195.06 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to bromine substitution, an aromatic ring system, 1-(Bromomethyl)-2-ethynylbenzene is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 195.06 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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-(Bromomethyl)-2-ethynylbenzene 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 | C9H7Br |
| Molecular Weight | 195.06 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 |
| 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.) | 2017 |
| Halogen Content | Br-containing |
Related Bromomethyl Standards
- 1-(Bromomethyl)-4-ethynylbenzene (CAS 351002-91-0)
- 4-(bromomethyl)tetrahydropyran-4-ol (CAS 111511-51-4)
- (S)-4-(Bromomethyl)-2,2-dimethyl-1,3-dioxolane (CAS 113428-57-2)
- 1346603-73-3 4-(Bromomethyl)-2,2-dimethyl-1,3-dioxolane-d5 (CAS 1346603-73-3)
- 4-(Bromomethyl)-2-fluorothiophene (CAS 1400991-71-0)
- (R)-4-(Bromomethyl)-2,2-dimethyl-1,3-dioxolane (CAS 14437-87-7)
- 1-(Bromomethyl)-1-fluorocyclohexane (CAS 17171-00-5)
- 1-(Bromomethyl)-2-fluorocyclohexane (CAS 1780952-44-4)
Recommended Standards
- (5-bromo-1-methyl-1H-imidazol-2-yl)methanol (CAS 861362-06-3)
- (4-bromo-1-methyl-1H-pyrazol-3-yl)methanol (CAS 915707-65-2)
- 1-Bromo-2-(4-methylphenyl)acetylene (CAS 33491-05-3)
- (1-Bromoprop-2-yn-1-yl)benzene (CAS 50874-14-1)
- 3-(2-Iodophenyl)-1,4-dimethyl-1h-pyrazol-5-amine (CAS 1152664-20-4)
- 1H-Pyrrole-2-carboxylic acid-5-amino-ethyl ester (CAS 755750-25-5)
- N-(2,5-dinitrophenyl)acetamide (CAS 3717-73-5)
- [(1,2-η)-2,2'',4,4'',6,6''-Hexamethyl[1,1':3',1''-terphenyl]-2'-thiolato-κS](triphenylphosphine)nickel (CAS 1119944-29-4)
- 2-{3,5-dimethyl-1h-pyrazolo[3,4-b]pyridin-1-yl}acetic acid (CAS 937605-68-0)
- Ethyl 2-(2-nitro-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate (CAS 1198615-90-5)
- 1-Isobutyl-5-methyl-1H-pyrazole-4-carboxylic acid (CAS 725746-95-2)
- 2-(6-(Piperidin-1-yl)pyridin-3-yl)pyrrolidine-1-carbaldehyde (CAS 1352532-71-8)
- 3-Allyl-2-((2-hydroxyethyl)thio)-3,5-dihydro-4H-pyrimido[5,4-b]indol-4-one (CAS 888445-31-6)
- Semaglutide impurity 197 (CAS CATO-C4X-2226197)
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