TCI H0526 Ethyl Heptadecanoate is the ethyl ester of heptadecanoic acid, a seventeen-carbon straight-chain fatty acid. Because its carbon count is odd, this compound is virtually absent in any meaningful quantity from natural fats and oils, which are overwhelmingly dominated by even-numbered fatty acids. That very characteristic is what makes it so valuable in the lipid analysis laboratory: the compound is used as an internal standard in the determination of fatty acid composition by gas chromatography, so that its peak does not overlap with the natural components of the sample under analysis.
The advantage that leads analysts to select this material lies in how closely its chemical and physical behaviour resembles that of the analytes being measured. As a fatty acid ester, the compound undergoes extraction, transesterification, and vaporisation in the gas chromatograph in a manner that mirrors the other fatty acid esters present in the sample, allowing it to correct for losses during preparation as well as for variability in injection. Its long aliphatic chain gives it a retention time that falls in the middle of the common fatty acid ester series, making it easy to recognise and cleanly resolved from neighbouring peaks. Its stability under ordinary storage conditions also means that standard solutions remain dependable over time.
In Indonesian laboratories, this material is typically encountered wherever fatty acid profiles have to be quantified rather than merely identified. It serves food and agricultural testing laboratories examining edible oil composition, university and institutional research groups working on lipid biochemistry, and quality control units that need reliable recovery figures for their gas chromatographic methods. The compound is usually held as part of the standard reagent inventory supporting routine fatty acid methyl and ethyl ester determinations.
- Internal standard for gas chromatographic fatty acid profiling, where its odd-chain structure guarantees that its peak never coincides with the naturally occurring even-chain components of the sample.
- Correction of preparation losses in lipid extraction workflows, because the compound is carried through extraction and transesterification in the same way as the fatty acid esters being quantified.
- Compensation for injection variability in gas chromatography, since a known added amount allows peak areas to be normalised regardless of small differences in injected volume between runs.
- Retention time reference within the common fatty acid ester series, as its long aliphatic chain places it centrally in the elution order and separates it cleanly from adjacent peaks.
- Preparation of stable calibration and standard solutions for lipid composition work, made practical by the compound's stability under ordinary laboratory storage conditions over extended periods.
| Brand | TCI |
|---|---|
| CAS number | 14010-23-2 |
| Molecular formula | — |
| Purity | — |
| Category | Life Science > Biochemicals and Reagents > Lipids |
| Pack sizes | available in the standard catalogue pack sizes offered by TCI for this item |
| Physical form | — |
| Storage | stable under ordinary laboratory storage conditions |
- Catalogue number: H0526
Store the container in a cool, dry place away from direct sunlight and sources of heat or ignition, following the storage conditions stated on the manufacturer's label and safety data sheet. Keep the material tightly closed in its original container, or in clean glass vials with inert, solvent-resistant closures when standard solutions are prepared, since plastics may be attacked by the ester or introduce contaminants into the analysis. Handle the compound in a well-ventilated area or fume hood, wear appropriate gloves, safety glasses, and a laboratory coat, and avoid contact with skin and eyes. Allow chilled containers to reach room temperature before opening to prevent moisture condensation, and label all prepared solutions clearly with preparation dates so that standard integrity can be tracked over time.
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