3,3-Dimethyl-1-butene
3,3-Dimethyl-1-butene (CAS 558-37-2) is a branched alkene with the molecular formula C6H12. This volatile organic compound is recognised for its role as a building block in organic synthesis. Its chemical structure lends itself to various reactions, making it a valuable intermediate in the preparation of more complex molecules. Tech Serve Solutions supplies this compound for research and industrial applications requiring a reliable source of this specific olefin.
- IUPAC
- Neohexene
- Synonyms
- (CH3)3CCH=CH2Neohexene

Organic Synthesis Intermediate
3,3-Dimethyl-1-butene serves as a crucial intermediate in the synthesis of various organic compounds. Its alkene functionality allows for participation in addition reactions, polymerizations, and other transformations essential for creating complex molecules.
Building Block for Specialty Chemicals
This compound functions as a valuable building block in the production of specialty chemicals. It can be utilised in reactions to introduce the neohexenyl moiety into target structures, finding use in niche chemical manufacturing processes.
Research and Development
In research laboratories, 3,3-Dimethyl-1-butene is employed as a reagent in developing new synthetic methodologies and exploring novel chemical pathways. Its distinct structure makes it a subject of interest for academic and industrial R&D.
| Molecular weight | 84.16 |
|---|---|
| Linear formula | (CH3)3CCH=CH2 |
| Assay | ≥97% (GC) |
| Boiling point | 41 °C(lit.) |
| Density | 0.653 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.376(lit.) |
| Vapour pressure | 6.96 psi (20 °C) |
| Melting point | −115 °C(lit.) |
| Vapour density | >1 (vs air) |



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, Gloves |
|---|---|
| Flash point | -8 °C / 17.6 °F |
| Transport (UN / ADR) | UN 3295BE 3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,Xn |
| Risk statements (R) | 11-36/37/38-65 |
| Safety statements (S) | 16-26-33-36-62 |
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 3,3-Dimethyl-1-butene used for?
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3,3-Dimethyl-1-butene is primarily used as a building block and intermediate in organic synthesis and chemical research.
What is the CAS number and formula for 3,3-Dimethyl-1-butene?
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The CAS number is 558-37-2 and the linear formula is (CH3)3CCH=CH2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,3-Dimethyl-1-butene with a purity of ≥97% (GC). We do not represent this product as USP, BP, EP, or any pharmacopoeia grade.
What are the main safety hazards associated with 3,3-Dimethyl-1-butene?
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3,3-Dimethyl-1-butene is highly flammable (Danger, H225) and may be fatal if swallowed and enters airways (H304). It also causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335).
How is 3,3-Dimethyl-1-butene packed and shipped?
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3,3-Dimethyl-1-butene is typically packed in suitable containers for transport. It is classified under UN 3295, HYOCARBONS, LIQUID, N.O.S., Hazard Class 3, Packing Group II, and is exported according to international shipping regulations.
How can I request a sample or quote for 3,3-Dimethyl-1-butene?
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To request a sample or obtain a quotation for 3,3-Dimethyl-1-butene, please contact our sales department via the website or by phone, providing your specific requirements.
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