26474-40-8 cis-Parinaric acid methyl ester 9,11,13,15-Octadecatetraenoic acid, methyl ester, (Z,Z,E,E)- 9,11,13,15-cis,trans,trans,cis-Octadecatetraenoic acid methyl ester CAS 26474-40-8
| CAS No. | 26474-40-8 |
| Molecular Formula | C19H30O2 |
| Molecular Weight | 290.44 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
26474-40-8 cis-Parinaric acid methyl ester 9,11,13,15-Octadecatetraenoic acid, methyl ester, (Z,Z,E,E)- 9,11,13,15-cis,trans,trans,cis-Octadecatetraenoic acid methyl ester (CAS 26474-40-8) is a high-purity analytical reference standard with the molecular formula C19H30O2 and a molecular weight of 290.44 g/mol.
The molecular framework of 26474-40-8 cis-Parinaric acid methyl ester 9,11,13,15-Octadecatetraenoic acid, methyl ester, (Z,Z,E,E)- 9,11,13,15-cis,trans,trans,cis-Octadecatetraenoic acid methyl ester (C19H30O2) is characterized by a steroid core, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
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.
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 | C19H30O2 |
| Molecular Weight | 290.44 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
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