3-Methyl-2-buten-1-ol
3-Methyl-2-buten-1-ol (CAS 556-82-1) is an acyclic unsaturated alcohol with the linear formula (CH3)2C=CHCH2OH and a molecular weight of 86.13 g/mol. It serves as a valuable building block in organic synthesis, particularly in the preparation of complex molecules. Its applications span chemical synthesis and cell biology research, making it a key reagent for advanced chemical development.
- IUPAC
- 3,3-Dimethylallyl alcohol,Prenol
- Synonyms
- 3,3-Dimethylallyl alcoholPrenol

Organic Synthesis Building Block
3-Methyl-2-buten-1-ol is utilised as a crucial starting material in the synthesis of various organic compounds. Its unsaturated alcohol functionality allows for diverse chemical transformations, making it valuable for constructing complex molecular architectures.
Asymmetric Synthesis
This compound was employed as a reagent in the asymmetric total syntheses of umbelactone isomers. Specifically, it played a role in reactions employing Sharpless asymmetric epoxidation, enabling stereoselective synthesis.
Chemical Research and Development
As a versatile chemical intermediate, 3-Methyl-2-buten-1-ol is utilised in research laboratories for developing new synthetic pathways and exploring novel chemical entities. Its properties make it suitable for various chemical synthesis applications.
| Molecular weight | 86.13 |
|---|---|
| Linear formula | (CH3)2C=CHCH2OH |
| Assay | ≥98.0% (GC) |
| Boiling point | 140 °C(lit.) |
| Density | 0.848 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.443(lit.)n20/D 1.443 |
| Vapour pressure | 1.4 mmHg (20 °C) |
| Application | 3-Methyl-2-buten-1-ol was used as starting reagent during asymmetric total syntheses of (R)-(+)- and (S)-(-)-umbelactone via Sharpless asymmetric epoxidation reaction1. |


Hazard statements
- H226Flammable liquid and vapour
- H302Harmful if swallowed
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 43 °C / 109.4 °F |
| Transport (UN / ADR) | UN 1987C 3 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 10-22-36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Expl Lim | 16.3 % |
|---|
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-Methyl-2-buten-1-ol primarily used for?
+
3-Methyl-2-buten-1-ol is primarily used as a building block in organic synthesis and for asymmetric synthesis, notably in the preparation of complex molecules like umbelactones.
What are the CAS number and chemical formula for 3-Methyl-2-buten-1-ol?
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The CAS number for 3-Methyl-2-buten-1-ol is 556-82-1, and its linear chemical formula is (CH3)2C=CHCH2OH.
What grade and purity does Tech Serve Solutions supply for 3-Methyl-2-buten-1-ol?
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Tech Serve Solutions supplies 3-Methyl-2-buten-1-ol with a purity of ≥98.0% (GC). We do not represent this product as USP, EP, or BP grade.
How should 3-Methyl-2-buten-1-ol be handled safely?
+
3-Methyl-2-buten-1-ol is a flammable liquid and vapour (H226), harmful if swallowed (H302), and causes skin (H315), serious eye (H319), and respiratory irritation (H335). Ensure adequate ventilation, wear appropriate personal protective equipment including eyeshields, face shield, and suitable gloves, and avoid ignition sources.
How is 3-Methyl-2-buten-1-ol packed and shipped?
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3-Methyl-2-buten-1-ol is classified as UN 1987, Class 3, Packing Group III, indicating it is shipped as a flammable liquid in appropriate packaging according to international regulations.
How can I request a quote or sample for 3-Methyl-2-buten-1-ol?
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To request a quote or sample of 3-Methyl-2-buten-1-ol, please contact our sales team through the TSS website or your designated account manager.
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