(9E,12Z,15E)-Octadecatrienoic Acid CAS 21661-13-2

Purity 97%+In StockPharmaceutical Standards
CAS No.21661-13-2
Molecular FormulaC18H30O2
Molecular Weight278.43 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

(9E,12Z,15E)-Octadecatrienoic Acid CAS 21661-13-2 chemical structure

Description

(9E,12Z,15E)-Octadecatrienoic Acid (CAS 21661-13-2) is a high-purity analytical reference standard with the molecular formula C18H30O2 and a molecular weight of 278.43 g/mol.

Based on its molecular formula C18H30O2, (9E,12Z,15E)-Octadecatrienoic Acid contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 278.43 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).

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

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 FormulaC18H30O2
Molecular Weight278.43 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.)1963

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