Description
Isooctane (2,2,4-Trimethylpentane, CAS 540-84-1) is a branched-chain alkane, 99% minimum purity, used as a technical-grade gasoline blending component. Since Isooctane defines the 100 mark on the octane rating scale, it raises the anti-knock performance of gasoline formulations without increasing aromatic content.
Certificate of Analysis — Typical Results
Specifically, the table below reflects representative results from routine production testing.
| Item |
Specification |
Result |
Test Method |
| Color Saybolt |
≥+28 |
+30 |
GB/T 3555-1992 |
| Initial Boiling Point, °C |
≥97 |
99.0 |
GB/T 6536-2010 |
| Dry Point, °C |
≤101 |
100.0 |
GB/T 6536-2010 |
| Specific Gravity 20°C, kg/m³ |
690–699 |
690 |
GB/T 1884-2000 |
| Isooctane Content, wt% |
≥99 |
99.53 |
GB/T 9722-2006 |
| Heptane and Light Component Content, wt% |
≤0.5 |
0.03 |
GB/T 9722-2006 |
| Bromine Index, mg/100g |
≤10 |
2.40 |
GB/T 11136-1989 |
| Aromatics Content, ppm |
≤50 |
4.04 |
SH/T 0913-2015 |
| Total Sulfur, ppm |
≤1 |
0.75 |
GB 6324.4-86 |
| Water Content, ppm |
≤100 |
55.79 |
GB/T 11133-2015 |
A batch-specific Certificate of Analysis is issued with every shipment.
Reference Data
- CAS Number: 540-84-1
- Molecular Formula: C₈H₁₈
- Common Name: Isooctane, 2,2,4-Trimethylpentane
Applications
Gasoline Blending — Isooctane raises the anti-knock rating of finished gasoline without increasing aromatic content, supporting cleaner-burning fuel blends.
Octane Reference Standard — Isooctane serves alongside n-heptane as one of the two reference fuels that define the octane rating scale used across the fuel industry.
Handling and Safety
Isooctane is a hazardous, flammable liquid. Handle, store, and transport it according to its Safety Data Sheet. Full SDS documentation is available on request.
Packaging
Isooctane is available in steel drums and ISO tank containers. See also n-Octane, 99% under the same Octanes product line, or request a quote. For general background on the octane rating system, see Wikipedia’s overview.