1-Ethoxy-4-((4-propylphenyl)ethynyl)benzene CAS 39969-29-4
| CAS No. | 39969-29-4 |
| Molecular Formula | C19H20O |
| Molecular Weight | 264.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of 1-Ethoxy-4-((4-propylphenyl)ethynyl)benzene is closely related to a steroid core, a hydroxyl group, an ether linkage in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
1-Ethoxy-4-((4-propylphenyl)ethynyl)benzene (CAS 39969-29-4), molecular formula C19H20O and molecular weight 264.36 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a steroid core, a hydroxyl group, an ether linkage, 1-Ethoxy-4-((4-propylphenyl)ethynyl)benzene is typically pale yellow to yellow low-melting solid. Its solid-state physicochemical attributes — including a molecular weight of 264.36 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C19H20O |
| Molecular Weight | 264.36 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1968 |
Related Ethoxy Standards
- 3-ethoxy-4-(heptyloxy)benzaldehyde (CAS 727704-75-8)
- 4-(3-Ethoxy-propyl)-5-pyridin-4-yl-4H-[1,2,4]triazole-3-thiol (CAS 519150-20-0)
- 3-(3-Ethoxy-propyl)-2-mercapto-3H-quinazolin-4-one (CAS 380436-96-4)
- Methyl 4-(5-ethoxy-5-oxopentyl)benzoate (CAS 1956328-26-9)
- (2e)-3-[3-ethoxy-4-(2-methylpropoxy)phenyl]prop-2-enoic acid (CAS 568558-20-3)
- 5-(3-Ethoxy-4-hydroxybenzylidene)-2-thioxoimidazolidin-4-one (CAS 329207-64-9)
- 3-Ethoxy-2-(2-methoxyethyl)-2H-indazole-6-carboxylic acid (CAS 919106-94-8)
- 1-(6-Ethoxy-4,7-dimethoxybenzofuran-5-yl)ethanone (CAS 98362-17-5)
Recommended Standards
- 1-Butyl-4-((4-methoxyphenyl)ethynyl)benzene (CAS 35684-12-9)
- 1-n-Pentyl-2-phenylbenzimidazole (CAS 305347-17-5)
- 1,7-Diphenyl-4-hepten-3-one (CAS 79559-59-4)
- 1-Phenyl-3-(2,4,6-trimethylphenyl)-2-pyrazoline (CAS 60078-97-9)
- 1-(Ethoxymethoxy)-3-fluoro-2-iodo-5-(trifluoromethyl)benzene (CAS 2878443-51-5)
- 3-(3-Chlorophenyl)-5-fluorobenzoic acid (CAS 1261929-09-2)
- Methyl 2-(2-methyl-5-oxopyrazolidine-3-carboxamido)-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate (CAS 956203-95-5)
- Triclosan (CAS 3380-34-5)
- N-(2-Morpholinopyrimidin-5-yl)furan-2-carboxamide (CAS 1340722-50-0)
- 2-(2,4-Bis(tert-pentyl)phenoxy)-N-(3,5-dichloro-4-ethyl-2-hydroxyphenyl)butyramide (CAS 93951-12-3)
- Butyrophenone-2',3',4',5',6'-d5 (CAS 39058-44-1)
- Dicyclohexyl(4-methoxy-3-(2,4,6-trimethoxyphenyl)naphthalen-2-yl)phosphine (CAS 1332745-81-9)
- Roxadustat Impurity 133 (CAS 2776-60-5)
- Endo-Pro36-Tirzepatide (CAS CATO-CPTD788688)
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