Isooctane(2-Methylheptane), scientifically recognized as 2,2,4-trimethylpentane (often colloquially or commercially associated with the octane rating standard), is a critical branched-chain alkane. It serves as a benchmark in the petrochemical industry and a high-performance solvent in analytical chemistry.

Product Technical Specifications-Isooctane(2-Methylheptane)

Property Value
Chemical Formula $C_8H_{18}$
CAS Number 540-84-1
Molecular Weight 114.23 g/mol
Appearance Clear, colorless liquid
Purity (GC) $\ge$ 99%
Density 0.692 g/mL at 25 °C
Boiling Point 98 – 99 °C
Flash Point -12 °C (Closed cup)

Key Applications and Industrial Uses-Isooctane(2-Methylheptane)

  • Petrochemical Standards: Isooctane defines the 100 point on the octane rating scale, making it indispensable for fuel testing and engine performance calibration.

  • Laboratory Analysis: Widely used as a non-polar solvent in Gas Chromatography (GC) and spectrophotometric analysis due to its low UV absorbance.

  • Pharmaceutical Manufacturing: Acts as a high-purity process solvent in the synthesis of specialized APIs.

  • Chemical Synthesis: Functions as a stable, inert medium for organic reactions requiring non-reactive hydrocarbon environments.

Safety and Handling (GHS Compliance)

Isooctane is classified as a highly flammable liquid and vapor. It may be fatal if swallowed and enters airways. It causes skin irritation and may cause drowsiness or dizziness. Always store in a cool, well-ventilated area away from ignition sources.

Frequently Asked Questions (FAQs)

Q1: What is the difference between Isooctane and 2-Methylheptane?

While both share the formula $C_8H_{18}$, Isooctane specifically refers to 2,2,4-trimethylpentane. The term is sometimes used broadly for other isomers like 2-methylheptane in commercial contexts, but for high-precision applications and CAS 540-84-1, 2,2,4-trimethylpentane is the industry standard.

Q2: Why is Isooctane used for octane rating?

Isooctane is highly resistant to “knocking” in internal combustion engines. By definition, it is assigned an octane number of 100, whereas n-heptane is assigned 0. This scale allows engineers to determine the anti-knock properties of various fuel blends.

Q3: Is this product suitable for HPLC applications?

Yes, our high-purity Isooctane (99%+) is processed to minimize impurities, making it suitable for most chromatographic and analytical laboratory requirements.

Q4: How should Isooctane be stored for long-term stability?

It should be stored in original, tightly sealed containers (stainless steel or fluorinated HDPE) at room temperature, shielded from direct sunlight and static discharge.

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