1,4-Diethynyl-2,5-dipropoxybenzene CAS 406721-43-5
| CAS No. | 406721-43-5 |
| Molecular Formula | C16H18O2 |
| Molecular Weight | 242.31 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
1,4-Diethynyl-2,5-dipropoxybenzene (CAS 406721-43-5) is a high-purity analytical reference standard with the molecular formula C16H18O2 and a molecular weight of 242.31 g/mol.
Based on its molecular formula C16H18O2, 1,4-Diethynyl-2,5-dipropoxybenzene contains a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 242.31 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), 1,4-Diethynyl-2,5-dipropoxybenzene 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 | C16H18O2 |
| Molecular Weight | 242.31 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
Related Diethynyl Standards
- 4,4'-Diethynyl-2,2'-dimethyl-1,1'-biphenyl (CAS 1788872-95-6)
- 3,8-Diethynyl-1,10-phenanthroline (CAS 640297-84-3)
- 1,4-Diethynyl-2,5-bis(trifluoromethyl)benzene (CAS 1084895-80-6)
- 5,5'-Diethynyl-2,2'-bithiophene (CAS 139896-68-7)
- 2,7-Diethynyl-9H-fluorene (CAS 94463-11-3)
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- 2',5'-Diethynyl-p-terphenyl (CAS 871248-64-5)
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Recommended Standards
- 1,3-diethyl 2-(prop-2-en-1-yl)-2-(propan-2-yl)propanedioate (CAS 59726-39-5)
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- 1,2-Di-p-tolylethane-1,2-diol (CAS 24133-59-3)
- 1-[(tert-butoxy)carbonyl]cycloheptane-1-carboxylic acid (CAS 1989672-44-7)
- Flutolanil (CAS 66332-96-5)
- 5-Chloro-2-(((4-hydroxytetrahydro-2h-pyran-4-yl)methyl)amino)benzonitrile (CAS 1376300-37-6)
- 3-(Chloromethyl)-1-methyl-1H-pyrazole hydrochloride (CAS 88529-80-0)
- 1-(2'-Methyl-[2,4'-bithiazol]-4-yl)ethan-1-one (CAS 849066-64-4)
- 1H-Purine-6-sulfonic acid (CAS 25023-39-6)
- 4-Methyl-2-((4-nitrobenzyl)sulfonyl)pyrimidine (CAS 866138-24-1)
- (r)-2-(1-Hydroxyethyl)-6-methoxyphenol (CAS 1932548-38-3)
- N1,N1-Diphenylethane-1,2-diamine (CAS 1140-29-0)
- Methyltripropoxysilane (CAS 5581-66-8)
- Semaglutide Impurity 129 (CAS 2490269-79-7)
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