ISOOCTANE- ▸ Octane reference: 100-octane standard in fuel octane-number testing.
- ▸ Spectroscopy solvent: UV/spectrophotometric analysis solvent.
- ▸ Solvent/thinner: Nonpolar process solvent and thinner.
- ▸ Chemical intermediate: Feedstock in organic synthesis.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →
Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Isooctane (CAS 540-84-1), the hydrocarbon 2,2,4-trimethylpentane, is the 100-point anchor of the octane-rating scale. It is used as a reference standard in fuel octane-number testing and in spectrophotometric analysis, and as a high-purity solvent, thinner, and chemical intermediate.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 208-759-1
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is 2,2,4-trimethylpentane used for?
2,2,4-Trimethylpentane (isooctane, CAS 540-84-1) is the 100-point anchor of the octane-rating scale. It is used as a reference standard in fuel octane-number testing, as a solvent in UV/spectrophotometric analysis, as a high-purity nonpolar solvent and thinner, and as a chemical intermediate. RawSource supplies it in bulk to labs and manufacturers.
What is the common name for 2,2,4-trimethylpentane?
Its common name is isooctane. The name reflects its role as the 100-octane reference fuel; chemically it is the branched C8 alkane 2,2,4-trimethylpentane, CAS 540-84-1, formula C8H18.
What grades of isooctane does RawSource supply?
Isooctane is available in reference/spectrophotometric and high-purity solvent grades; specify whether you need it as an octane-number reference standard or as a process solvent so the correct purity and CoA are matched. Confirm the exact specification when ordering.
What is the cost of bulk isooctane?
Isooctane pricing is volume- and grade-dependent (reference-grade purity costs more than solvent grade), so we do not list a fixed price. Send your quantity, grade, and packaging needs for a current bulk quote; CoA and SDS accompany shipment.
What UN number and HS code apply to isooctane?
Isooctane is assigned UN 1262 and ships as a flammable liquid per DOT/IMDG/IATA rules; it classifies under HS 2901.10 (saturated acyclic hydrocarbons). RawSource ships it compliantly in bulk with SDS and CoA. Confirm DOT and tariff details before arranging freight.
What is the REACH and TSCA regulatory status of Isooctane (2,2,4-Trimethylpentane)?
Isooctane (2,2,4-Trimethylpentane) (CAS 540-84-1) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 208-759-1).