2-chloro-4-ethynyl-1-methoxybenzene CAS 120136-29-0
| CAS No. | 120136-29-0 |
| Molecular Formula | C9H7ClO |
| Molecular Weight | 166.60 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-chloro-4-ethynyl-1-methoxybenzene (CAS 120136-29-0) is a high-purity analytical reference standard with the molecular formula C9H7ClO and a molecular weight of 166.60 g/mol.
Based on its molecular formula C9H7ClO, 2-chloro-4-ethynyl-1-methoxybenzene contains a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 166.60 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C9H7ClO |
| Molecular Weight | 166.60 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.) | 1991 |
| Halogen Content | Cl-containing |
Related chloro Standards
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- tert-Butyl 7-amino-2-oxo-2,3-dihydro-1H-benzo[e][1,4]diazepine-4(5H)-carboxylate (CAS 1374651-40-7)
- 2-Oxo-2',4',6'-triphenyl-2H-[1,1'-bipyridin]-1'-ium tetrafluoroborate (CAS 454696-30-1)
- 1,3,5-Tribromo-2-(difluoromethyl)benzene (CAS 1261684-53-0)
- (R)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-([1,1'-biphenyl]-4-yl)propanoic acid (CAS 1260593-25-6)
- Sulfentrazone (CAS 122836-35-5)
- Peptide 442 (CAS CATO-CPTD788442)
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