4-Bromo-1-chloro-2-ethynylbenzene CAS 1696309-52-0
| CAS No. | 1696309-52-0 |
| Molecular Formula | C8H4BrCl |
| Molecular Weight | 215.47 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
4-Bromo-1-chloro-2-ethynylbenzene (CAS 1696309-52-0), molecular formula C8H4BrCl and molecular weight 215.47 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C8H4BrCl, 4-Bromo-1-chloro-2-ethynylbenzene contains chlorine/bromine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 215.47 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).
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 | C8H4BrCl |
| Molecular Weight | 215.47 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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.) | 1994 |
| Halogen Content | Cl/Br-containing |
Related Bromo Standards
- 1-Bromo-4-chloro-2-ethynylbenzene (CAS 1268870-34-3)
- 2-Bromo-4-chloro-1-ethynylbenzene (CAS 1350535-10-2)
- 4-Bromo-2-chloro-1-ethynylbenzene (CAS 1603573-36-9)
- 1-Bromo-3-chloro-5-ethynylbenzene (CAS 1639847-49-6)
- 1-Bromo-3-chloro-2-ethynylbenzene (CAS 1856321-53-3)
- 1-Bromo-2-chloro-4-ethynylbenzene (CAS 313511-09-0)
- Methyl 2-bromo-4-chlorobutanoate (CAS 24666-02-2)
- 5-bromo-6-chloropyrazin-2-ol (CAS 913282-74-3)
Recommended Standards
- 1-(Bromoethynyl)-3-chlorobenzene (CAS 934001-82-8)
- 1-(Bromoethynyl)-4-chlorobenzene (CAS 33491-03-1)
- 2,2,2-Trichloro-1-(4,5-dihydrofuran-3-yl)ethanone (CAS 83124-80-5)
- 3-ethyl-5-(trichloromethyl)-1,2,4-oxadiazole (CAS 1196-99-2)
- 3-(2,2-dimethyloxan-4-yl)-4-phenylbutan-1-amine (CAS 309270-88-0)
- 2-(4-Chlorophenyl)-5-ethyl-5-methylmorpholine (CAS 1342788-82-2)
- 3-fluoro-4-(4-methyl-1H-pyrazol-1-yl)benzene-1-sulfonyl chloride (CAS 1341340-38-2)
- 5-(aminomethyl)-1H-1,3-benzodiazol-2-amine dihydrochloride (CAS 1789007-38-0)
- 1,2-Dibromocyclopentane (CAS 29974-65-0)
- (3-Aminopyridin-2-yl)boronic acid (CAS 948593-62-2)
- (3E)-1-Acetyl-3-[(4-methoxyphenyl)methylidene]piperazine-2,5-dione (CAS 74720-30-2)
- 2-(4-Boc-piperazino)-2-(3,4-dimethoxyphenyl)acetic acid (CAS 885274-66-8)
- Methyl 2-(((benzyloxy)carbonyl)amino)-2-(5-methylfuran-2-yl)acetate (CAS 61886-77-9)
- Semaglutide Impurity 167 (CAS CATO-C4X-2226167)
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