9(E),11(E)-Octadecadienoic acid CAS 544-71-8

Purity >95%In StockPharmaceutical Standards
CAS No.544-71-8
Molecular FormulaC18H32O2
Molecular Weight280.45 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

9(E),11(E)-Octadecadienoic acid CAS 544-71-8 chemical structure

Description

Compared with other compounds in its class, the molecular weight of 280.45 g/mol gives 9(E),11(E)-Octadecadienoic acid distinctive chromatographic separation conditions and mass-spectrometry parameter settings.

9(E),11(E)-Octadecadienoic acid (CAS 544-71-8), molecular formula C18H32O2 and molecular weight 280.45 g/mol, is a CATO reference standard with documented purity and traceability.

Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, 9(E),11(E)-Octadecadienoic acid is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 280.45 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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 FormulaC18H32O2
Molecular Weight280.45 g/mol
Purity>95%
StorageStore at room temperature
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)3.0
UV AbsorptionUV-absorbing
CAS Registry Year (est.)1957

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