Methyl 3,3-dimethyl-4-pentenoate
Methyl 3,3-dimethyl-4-pentenoate (CAS 63721-05-1) is an organic ester with the linear formula H₂C=CHC(CH₃)₂CH₂CO₂CH₃ and a molecular weight of 142.20. This compound serves as a versatile building block in organic synthesis. It is characterised by its ester functionality and terminal alkene group, making it suitable for various chemical transformations in research and development settings.
- Synonyms
- H2C=CHC(CH3)2CH2CO2CH3

Organic Synthesis Intermediate
Methyl 3,3-dimethyl-4-pentenoate is a valuable intermediate in the synthesis of more complex organic molecules. Its dual functionality allows for diverse chemical modifications.
Research and Development
Utilised in chemical research, this ester can be employed in the development of new compounds and materials. Its specific structure lends itself to targeted synthetic pathways.
Building Block for Specialty Chemicals
As an organic building block, it contributes to the creation of specialty chemicals where precise molecular architecture is required. Its availability supports custom synthesis projects.
| Molecular weight | 142.20 |
|---|---|
| Linear formula | H2C=CHC(CH3)2CH2CO2CH3 |
| Assay | 98% |
| Density | 0.899 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.423(lit.) |

Hazard statements
- H226Flammable liquid and vapour
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 42 °C / 107.6 °F |
| Transport (UN / ADR) | UN 3272 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Risk statements (R) | 10 |
| Safety statements (S) | 16 |
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 Methyl 3,3-dimethyl-4-pentenoate used for?
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Methyl 3,3-dimethyl-4-pentenoate is primarily used as an intermediate in organic synthesis and as a building block in research and development for creating more complex organic molecules and specialty chemicals.
What are the CAS number and formula for Methyl 3,3-dimethyl-4-pentenoate?
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The CAS number for Methyl 3,3-dimethyl-4-pentenoate is 63721-05-1, and its linear formula is H₂C=CHC(CH₃)₂CH₂CO₂CH₃.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Methyl 3,3-dimethyl-4-pentenoate with an assay of 98%. This product is supplied for research and development purposes and is not represented as USP, BP, EP, or any other pharmacopoeia grade.
What are the main safety hazards associated with Methyl 3,3-dimethyl-4-pentenoate?
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Methyl 3,3-dimethyl-4-pentenoate is a flammable liquid and vapour (H226), with a flash point of 42 °C (107.6 °F). It requires careful handling away from ignition sources. Appropriate personal protective equipment, including eyeshields, gloves, and suitable respiratory protection, should be used.
How is Methyl 3,3-dimethyl-4-pentenoate packed and shipped?
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Methyl 3,3-dimethyl-4-pentenoate is shipped according to UN 3272, Class 3, Packing Group III regulations for flammable liquids. Specific packaging details are available upon request, and TSS exports globally.
How can I request a quote or sample for Methyl 3,3-dimethyl-4-pentenoate?
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To request a quote or a sample of Methyl 3,3-dimethyl-4-pentenoate, please contact the TSS sales team via our website or direct contact details. We are happy to assist with your specific requirements.
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