9Z,11E,13E-Octadecatrienoic Acid Ethyl Ester CAS 42021-86-3

Purity 97%+In StockPharmaceutical Standards
CAS No.42021-86-3
Molecular FormulaC20H34O2
Molecular Weight306.48 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

9Z,11E,13E-Octadecatrienoic Acid Ethyl Ester CAS 42021-86-3 chemical structure

Description

Owing to a steroid core, a hydroxyl group, an ether linkage, 9Z,11E,13E-Octadecatrienoic Acid Ethyl Ester is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 306.48 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

9Z,11E,13E-Octadecatrienoic Acid Ethyl Ester (CAS 42021-86-3), molecular formula C20H34O2 and molecular weight 306.48 g/mol, is a CATO reference standard with documented purity and traceability.

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 FormulaC20H34O2
Molecular Weight306.48 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)4.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1969

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