3-Iodo-2-methylpropene
3-Iodo-2-methylpropene (CAS: 3756-30-7), a chemical compound with the formula C4H7I and a molecular weight of 182.00 g/mol, is an organoiodine compound. This substance is characterised by its acyclic alkene structure and serves as a valuable building block in organic synthesis. It is utilized in various chemical processes, particularly where the introduction of an iodinated moiety is required for further functionalization.
- IUPAC
- Methallyl iodide,Methylallyl iodide
- Synonyms
- Methallyl iodideMethylallyl iodide

Organic Synthesis Intermediate
3-Iodo-2-methylpropene is frequently employed as an intermediate in the synthesis of complex organic molecules. Its reactivity allows for diverse chemical transformations, making it a useful component in multi-step synthetic routes.
Research and Development
This compound finds application in laboratory settings for research purposes. Chemists utilise it to explore new synthetic methodologies and to construct novel chemical structures.
Building Block Chemistry
As a functionalised alkene, 3-Iodo-2-methylpropene acts as a versatile building block in academic and industrial research. It enables the efficient introduction of specific structural elements into target compounds.
| Molecular weight | 182.00 |
|---|---|
| Empirical formula | C4H7I |
| Assay | ≥97.0% (GC) |
| Density | 1.693 g/mL at 20 °C |
| Storage temperature | 2-8°C |
| Contains / stabiliser | copper as stabilizer |


Hazard statements
- H225Highly flammable liquid and vapour
- H314Causes severe skin burns and eye damage
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Flash point | 8 °C / 46.4 °F |
|---|---|
| Transport (UN / ADR) | UN 2924 8(3) / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,C |
| Risk statements (R) | 11-34 |
| Safety statements (S) | 16-26-36/37/39-45 |
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-Iodo-2-methylpropene used for?
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3-Iodo-2-methylpropene is primarily used as an intermediate in organic synthesis and as a building block in chemical research and development.
What is the CAS number and formula for 3-Iodo-2-methylpropene?
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The CAS number is 3756-30-7 and the empirical formula is C4H7I.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3-Iodo-2-methylpropene with an assay of ≥97.0% (GC). We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 3-Iodo-2-methylpropene be handled safely?
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3-Iodo-2-methylpropene is a flammable liquid and causes severe skin burns and eye damage. Handle with extreme caution, ensuring adequate ventilation, appropriate personal protective equipment (gloves, eye protection), and keeping away from ignition sources. Refer to the Safety Data Sheet for detailed handling instructions.
How is 3-Iodo-2-methylpropene packed and shipped?
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This product is shipped as UN 2924, Hazard Class 8 (Corrosive) with Subsidiary Hazard 3 (Flammable), Packing Group II. It is typically stored at 2-8°C and contains copper as a stabilizer.
How can I request a sample or quote for 3-Iodo-2-methylpropene?
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Please contact our sales team via the website or direct email to request a sample or a quotation for 3-Iodo-2-methylpropene.
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