Products Description of 2,2,4-TrimethylpentaneCAS#540-84-1
2,2,4‑Trimethylpentane, also commonly called isooctane, CAS 540‑84‑1, is an aliphatic alkane with molecular formula C₈H₁₈ and molecular weight 114.23. It is a colorless transparent liquid with faint hydrocarbon odor, low solubility in water and good compatibility with many organic solvents.
It is well‑known as the standard reference fuel for octane rating testing. Besides fuel calibration, it is widely used as analytical solvent for chromatography, organic synthesis solvent and diluent in laboratory and fine chemical industries.
We provide high‑purity 2,2,4‑Trimethylpentane with stable batch quality. Free samples can be arranged for your lab evaluation. Multiple shipping alternatives are accessible: air, sea, railway and international express to meet different order volumes and destination demands. Reliable after‑sales support is provided.
2,2,4-Trimethylpentane Chemical Properties
| Melting point | -107 °C |
| Boiling point | 98-99 °C(lit.) |
| density | 0.692 g/mL at 25 °C(lit.) |
| vapor density | 3.9 (vs air) |
| vapor pressure | 41 mm Hg ( 21 °C) |
| refractive index | n20/D 1.391(lit.) |
| Fp | 18 °F |
| storage temp. | Store at +5°C to +30°C. |
| solubility | water: insoluble |
| form | Liquid |
| pka | >14 (Schwarzenbach et al., 1993) |
| Specific Gravity | 0.692 (20/4℃) |
| color | APHA: ≤10 |
| Relative polarity | -0.4 |
| explosive limit | 1%(V) |
| Odor Threshold | 0.11ppm |
| Water Solubility | INSOLUBLE |
| FreezingPoint | -107.52℃ |
| λmax | λ: 205 nm Amax: 1.00 λ: 225 nm Amax: 0.10 λ: 254 nm Amax: 0.01 |
| Merck | 14,5193 |
| BRN | 1696876 |
| Henry's Law Constant | 3.23 at 25 °C (Mackay and Shiu, 1981) |
| Exposure limits | ACGIH TLV: TWA for all isomers 300 ppm (adopted). |
| Dielectric constant | 2.1（Ambient） |
| Stability: | Stable. Highly flammable. Incompatible with oxidizing agents, reducing agents. |
| LogP | 4.373 (est) |
| CAS DataBase Reference | 540-84-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Pentane, 2,2,4-trimethyl-(540-84-1) |
| EPA Substance Registry System | 2,2,4-Trimethylpentane (540-84-1) |
