C38H78

C38H78 is a saturated hydrocarbon in the alkane family, consisting of 38 carbon atoms and 78 hydrogen atoms. It belongs to the paraffins class, characterized by carbon and hydrogen linked by single bonds. For alkanes, the general formula is CnH2n+2, and substituting n=38 gives C38H78.

Nomenclature: The IUPAC name is octatriacontane; the straight-chain isomer is n-octatriacontane. Because there are many possible arrangements of 38 carbons, numerous branched isomers exist, each with different physical properties.

Structure and properties: Being a saturated hydrocarbon with only C–C and C–H single bonds, it is nonpolar and chemically inert under standard conditions. Its high molecular weight yields low volatility, relatively high melting and boiling points, and poor water solubility; it is usually soluble in nonpolar solvents.

Occurrence and uses: Alkanes of this size are typical components of complex petroleum fractions and paraffin waxes. Individually, C38H78 and its isomers are generally not used as pure chemicals but exist as constituents of fuels, lubricants, waxes, and cosmetics formulations depending on the exact isomer and purity.

Safety: Long-chain alkanes are flammable and can be hazardous if mishandled, with standard precautions for hydrocarbon liquids or solids. They have low acute toxicity but may cause skin or eye irritation on contact and should be stored away from heat and ignition sources.