(9E,11E,13E,15E)-9,11,13,15-Octadecatetraenoic Acid CAS 18841-21-9

Purity 97%+In StockPharmaceutical Standards
CAS No.18841-21-9
Molecular FormulaC18H28O2
Molecular Weight276.41 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

(9E,11E,13E,15E)-9,11,13,15-Octadecatetraenoic Acid CAS 18841-21-9 chemical structure

Description

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.

CATO supplies (9E,11E,13E,15E)-9,11,13,15-Octadecatetraenoic Acid (CAS 18841-21-9), a certified reference material (molecular formula C18H28O2, MW 276.41 g/mol) for analytical method development and quality control.

The molecular framework of (9E,11E,13E,15E)-9,11,13,15-Octadecatetraenoic Acid (C18H28O2) 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).

Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.

Physical & Chemical Properties

Molecular FormulaC18H28O2
Molecular Weight276.41 g/mol
AppearanceOff-white to pale yellow crystalline powder
Purity97%+
StorageStore at room temperature
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate, DMSO
StabilityMay oxidize slowly on prolonged air exposure
Degree of Unsaturation (DBE)5.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1962

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