2,4,4-Trimethyl-2-pentene
2,4,4-Trimethyl-2-pentene (CAS: 107-40-4) is a branched alkene with a molecular weight of 112.21 g/mol. This acyclic hydrocarbon serves as a valuable building block in organic synthesis and chemical research. Its applications include studying liquid-phase hydrogenation kinetics and use in gas chromatography-mass spectrometry analysis of hydrocarbon mixtures, particularly butene oligomerates. Tech Serve Solutions supplies this compound with an assay of ≥98.0% (GC).
- IUPAC
- β-Diisobutylene
- Synonyms
- 107-40-4(CH3)3CCH=C(CH3)2β-Diisobutylene

Hydrogenation Kinetics Studies
2,4,4-Trimethyl-2-pentene is utilised in research to investigate the kinetics of liquid-phase hydrogenation reactions. Studies have employed this alkene in conjunction with catalysts like Pd/γ-Al<sub>2</sub>O<sub>3</sub> in semibatch reactors to understand reaction mechanisms and rates.
GC-MS Analysis of Hydrocarbon Mixtures
This compound finds application in analytical chemistry, specifically in the characterisation of hydrocarbon mixtures. It has been used in the analysis of butene oligomerates, aiding in the identification and quantification of components using gas chromatography-mass spectrometry (GC-MS) techniques.
Organic Synthesis Building Block
As an alkene with a specific branched structure, 2,4,4-Trimethyl-2-pentene functions as a foundational component in organic synthesis. It provides a reactive site for various chemical transformations, contributing to the construction of more complex molecules.
| Molecular weight | 112.21 |
|---|---|
| Linear formula | (CH3)3CCH=C(CH3)2 |
| Assay | ≥98.0% (GC) |
| Boiling point | 104 °C(lit.) |
| Density | 0.72 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.416(lit.)n20/D 1.416 |
| Vapour density | >1 (vs air) |
| Melting point | −106.3-−106 °C(lit.) |
| Autoignition temp | 586 °F |
| Impurities tested | 2,4,4-trimethyl-1-pentene |
| Application | 2,4,4-Trimethyl-2-pentene was used to study the kinetics of liquid-phase hydrogenation of isooctenes on Pd/γ-Al2O3 catalyst in semibatch reactor1. It was used in the analysis of butene oligomerate produced over solid and liquid phosphoric acid by GC-MS techniques2. |



Hazard statements
- H225Highly flammable liquid and vapour
- H304May be fatal if swallowed and enters airways
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P261Avoid breathing dust, fume, gas or vapours
- P301IF SWALLOWED
- P305IF IN EYES
- P331Do NOT induce vomiting
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 2 °C / 35.6 °F |
| Transport (UN / ADR) | UN 2050 3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,Xn,N |
| Risk statements (R) | 11-36/37/38-51/53-65 |
| Safety statements (S) | 9-16-29-33-61 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 2,4,4-Trimethyl-2-pentene used for?
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2,4,4-Trimethyl-2-pentene is used in studies of liquid-phase hydrogenation kinetics and for the analysis of butene oligomerates via GC-MS. It also serves as a building block in organic synthesis.
What are the CAS number and formula for 2,4,4-Trimethyl-2-pentene?
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The CAS number for 2,4,4-Trimethyl-2-pentene is 107-40-4. Its linear formula is (CH <sub>3</sub>)<sub>3</sub>CCH=C(CH <sub>3</sub>)<sub>2</sub>.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2,4,4-Trimethyl-2-pentene with an assay of ≥98.0% (GC). This product is not represented as USP, BP, EP, or other pharmacopoeia grades.
How should 2,4,4-Trimethyl-2-pentene be handled safely?
+
2,4,4-Trimethyl-2-pentene is a highly flammable liquid and vapour (H225), can be fatal if swallowed and enters airways (H304), and causes skin (H315), eye (H319), and respiratory irritation (H335). Handle with appropriate personal protective equipment, including eyeshields, gloves, and adequate respiratory protection, in a well-ventilated area, away from ignition sources.
Is 2,4,4-Trimethyl-2-pentene a controlled substance?
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The provided data does not indicate that 2,4,4-Trimethyl-2-pentene is a controlled substance.
How is 2,4,4-Trimethyl-2-pentene packed and exported?
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2,4,4-Trimethyl-2-pentene is supplied according to international shipping regulations, including UN 2050 classification. Packaging is designed to ensure safety and integrity during transport and export.
How can I request a quote or sample for 2,4,4-Trimethyl-2-pentene?
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To request a quote or sample, please contact the Tech Serve Solutions sales team via our website or directly by phone, providing your contact details and the product information.
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