Tetracosane TCI T0075

Chemical Identity

CAS No.: 646-31-1
PubChem: CID 12592·SID 87576091
Formula: C24H50
Molecular weight: 338.7 g/mol
Purity: >99.0%(GC)
Reference databases: ChEBI·ChemSpider·ECHA·Wikipedia

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: tetracosane
SMILES: CCCCCCCCCCCCCCCCCCCCCCCC
InChIKey: POOSGDOYLQNASK-UHFFFAOYSA-N

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Tetracosane from TCI is a saturated, straight-chain alkane with twenty-four carbon atoms (n-C24). This paraffin hydrocarbon belongs to the non-heterocyclic building block category. In the laboratory it is used more often as a reference compound and model material than as a synthesis reactant. Typical uses include gas chromatography standards for hydrocarbon analysis, components of retention index marker mixtures, and model materials in research on paraffin waxes and thermal energy storage materials.

Laboratories choose Tetracosane because it has a simple structure, is chemically pure, and is very stable. The molecule has no reactive functional groups, so it is inert toward most reagents under ordinary conditions. Its long, straight carbon chain lets the molecules pack neatly in the crystal, which makes it a good model for studying crystallization, solid–liquid phase transitions, and wax behaviour. Because it is strongly nonpolar, it is also convenient as an internal standard when analysing organic samples, and it rarely interferes with the analytes of interest.

In Indonesia, Tetracosane is useful to petroleum and geochemistry analysis laboratories, environmental laboratories that monitor hydrocarbon pollution, and materials chemistry laboratories that study paraffin-based phase change materials. University research groups working in analytical chemistry, organic geochemistry, and materials science can use it as a well-defined reference compound for method development, instrument calibration, and teaching. Quality control laboratories that handle waxes, lubricants, or petroleum products may also use it to confirm chromatographic identification of long-chain alkanes.

Related TCI products

Gas chromatography hydrocarbon standard: as a pure, well-defined n-alkane, Tetracosane gives a clear reference peak for identifying and quantifying long-chain hydrocarbons in petroleum and environmental samples.
Retention index marker mixtures: as a single member of the homologous n-alkane series, it is a reliable component of marker mixtures used to calculate retention indices for unknown compounds.
Internal standard in organic analysis: its strong nonpolarity and chemical inertness mean it does not react with sample components, which makes it a dependable internal standard for nonpolar organic extracts.
Paraffin wax model studies: its long, straight carbon chain packs neatly in the crystal, so researchers use it to model the crystallization and solid–liquid behaviour of more complex commercial paraffin waxes.
Thermal energy storage research: as a paraffin hydrocarbon with well-ordered crystal packing, it is a useful model material for studying phase transitions in paraffin-based phase change materials for heat storage.

Brand	TCI (product code T0075)
CAS number	646-31-1
Molecular formula	—
Purity	—
Category	Chemistry > Building Blocks > Non-Heterocyclic Building Blocks
Pack sizes	available in the pack sizes TCI offers for this product; see the product page for current options
Physical form	saturated paraffin hydrocarbon (n-C24), crystalline waxy solid
Storage	keep tightly closed in a cool, dry place, away from oxidizing agents and sources of ignition

Store Tetracosane in its original, tightly sealed container in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and strong oxidizing agents. Glass or compatible chemically resistant containers with secure closures work well, and keeping the container closed helps prevent contamination from dust or volatile organic vapours in the laboratory. Handle the material with standard laboratory practice: wear safety glasses, gloves, and a lab coat, avoid creating or breathing dust, and work in a ventilated area when heating or melting the compound. Keep it away from open flames, because hydrocarbons are combustible. Always read the supplier's Safety Data Sheet before use and dispose of waste according to local regulations.

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