Product Details
Products Description of 2,2,4-Trimethylpentane CAS#540-84-1
2,2,4-Trimethylpentane, commonly known as isooctane, is a standard anti-knock agent with an octane rating of 100. Its chemical formula is C₈H₁₈, and its CAS number is 540-84-1. It has a melting point of −107.4°C and a boiling point of 98–99°C.
Isooctane is a colorless liquid with a high octane rating and is widely used as a gasoline additive. It also serves as a reference substance for determining gasoline octane ratings. Isooctane is insoluble in water but soluble in a variety of organic solvents, including diethyl ether, benzene, and acetone.

Key Physical & Chemical Properties
| Property | Specification |
|---|---|
| Chemical Formula | C₈H₁₈ |
| Appearance | Clear, colorless liquid |
| Boiling Point | ~99 °C |
| Flash Point | ~−12 °C |
| Octane Number | 100 (reference) |
| Solubility | Insoluble in water; miscible with organic solvents |
Main Applications
ummary: Serves across fuel testing, solvent extraction, and organic synthesis.
Octane Standard: Reference fuel for octane-number determination.
Solvent: High-purity solvent for extraction and cleaning.
Fuel Blending: High-octane gasoline component.
Polymerization: Diluent/solvent in polymer processes.
Analytical Chemistry: Calibration standard and solvent.
