3,7-Dimethyl-1-octene
3,7-Dimethyl-1-octene (CAS 4984-01-4) is a branched alkene with a molecular weight of 140.27 g/mol. This acyclic organic compound serves as a valuable building block in chemical synthesis. It is characterised by its primary alkene functionality, making it reactive for various organic transformations. Supplied by Tech Serve Solutions, it is suitable for research and industrial applications requiring a precisely defined unsaturated hydrocarbon.
- Synonyms
- (CH3)2CHCH2CH2CH2CH(CH3)CH=CH2

Organic Synthesis Intermediate
3,7-Dimethyl-1-octene acts as a versatile intermediate in the synthesis of more complex organic molecules. Its terminal double bond readily participates in addition reactions, polymerisation, and functional group transformations, enabling the construction of diverse chemical structures.
Research and Development
This compound is utilised in research laboratories for exploring new synthetic pathways and developing novel materials. Its specific structure allows chemists to investigate structure-activity relationships and design tailored chemical entities for various scientific disciplines.
Building Block for Specialty Chemicals
As an organic building block, 3,7-Dimethyl-1-octene can be incorporated into the synthesis of specialty chemicals, including potential fragrance components or performance additives. Its hydrocarbon chain offers lipophilic properties to target molecules.
| Molecular weight | 140.27 |
|---|---|
| Linear formula | (CH3)2CHCH2CH2CH2CH(CH3)CH=CH2 |
| Assay | ≥97.0% (GC) |
| Boiling point | 154-156 °C(lit.) |
| Density | 0.733 g/mL at 20 °C(lit.) |
| Refractive index | n20/D 1.417 |
| Storage temperature | 2-8°C |

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 | 52 °C / 125.6 °F |
| Transport (UN / ADR) | UN 3295C 3 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Risk statements (R) | 10 |
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 3,7-Dimethyl-1-octene used for?
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3,7-Dimethyl-1-octene is primarily used as a building block in organic synthesis and in research and development for creating complex organic molecules and specialty chemicals.
What are the CAS number and formula for 3,7-Dimethyl-1-octene?
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The CAS number for 3,7-Dimethyl-1-octene is 4984-01-4. Its linear formula is (CH₃)₂CHCH₂CH₂CH₂CH(CH₃)CH=CH₂.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 3,7-Dimethyl-1-octene with an assay of ≥97.0% (GC). This is a technical/research grade, and TSS does not represent it as USP, BP, or EP grade.
What are the safety and handling considerations for 3,7-Dimethyl-1-octene?
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3,7-Dimethyl-1-octene is a flammable liquid and vapour (H226). Handle with appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection, in a well-ventilated area. Store at 2-8°C.
How is 3,7-Dimethyl-1-octene packed, shipped, and exported?
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3,7-Dimethyl-1-octene is carefully packed according to international shipping regulations for hazardous materials (UN 3295, Class 3, PGIII). TSS has extensive experience in exporting chemicals globally.
How can I request a sample or a quote for 3,7-Dimethyl-1-octene?
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To request a sample or obtain a quote, please contact the Tech Serve Solutions sales team through our website or by phone, providing the product name and CAS number (4984-01-4).
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