2-Methyl-2-pentenal
2-Methyl-2-pentenal (CAS: 623-36-9), with the molecular formula C2H5CH=C(CH3)CHO and a molar mass of 98.14 g/mol, is an unsaturated aldehyde. This chemical compound is recognised for its role as an organic building block in chemical synthesis. It is also identified as a component in certain natural sources, including onion and safflower oil, suggesting potential applications in phytochemical research and nutrition studies.

Chemical Synthesis
2-Methyl-2-pentenal serves as a versatile organic building block. Its aldehyde functionality and double bond allow for diverse chemical transformations, making it valuable in the synthesis of more complex molecules.
Research and Development
As a carbonyl compound and an aldehyde, it finds application in laboratory research. Its structure is useful for exploring reaction mechanisms and developing new synthetic methodologies.
Phytochemical Analysis
Identified as a compound present in Allium cepa (onion) and Carthamus tinctorius (safflower oil), it can be used in studies related to natural product chemistry and flavour profiles.
Building Block for Organic Chemistry
This compound is part of the C1 to C6 range of organic molecules, useful for constructing carbon chains and introducing specific functional groups in organic synthesis.
| Molecular weight | 98.14 |
|---|---|
| Linear formula | C2H5CH=C(CH3)CHO |
| Assay | 97% |
| Boiling point | 137-138 °C/765 mmHg(lit.) |
| Density | 0.86 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.45(lit.) |



Hazard statements
- H226Flammable liquid and vapour
- H317May cause an allergic skin reaction
- H318Causes serious eye damage
- H331Toxic if inhaled
- H412Harmful to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P311Call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 32 °C / 89.6 °F |
| Transport (UN / ADR) | UN 1989C 3 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 10-20-41-43 |
| Safety statements (S) | 24-26-27-37-39 |
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-Methyl-2-pentenal used for?
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2-Methyl-2-pentenal is primarily used as an organic building block in chemical synthesis and for general laboratory research. It is also identified in certain natural products like onion and safflower oil, suggesting its use in phytochemical and nutrition research.
What are the CAS number and molecular formula for 2-Methyl-2-pentenal?
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The CAS number for 2-Methyl-2-pentenal is 623-36-9, and its molecular formula is C2H5CH=C(CH3)CHO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Methyl-2-pentenal with an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 2-Methyl-2-pentenal be handled safely?
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2-Methyl-2-pentenal is a flammable liquid and vapour (H226), may cause an allergic skin reaction (H317), causes serious eye damage (H318), and is toxic if inhaled (H331). It is also harmful to aquatic life with long lasting effects (H412). Handle with appropriate personal protective equipment, including eyeshields, face shields, gloves, and a suitable respirator, in a well-ventilated area.
How is 2-Methyl-2-pentenal packaged, shipped, and exported?
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2-Methyl-2-pentenal is shipped according to international regulations for hazardous materials, classified under UN 1989, Class 3, Packing Group III. TSS offers expert export services globally.
How can I request a sample or quote for 2-Methyl-2-pentenal?
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To request a sample or a quote for 2-Methyl-2-pentenal, please contact our sales team through the website or by phone. We will be pleased to assist you.
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