| Boiling Point | 122–123°C (lit.) |
| Melting Point | −101°C (lit.) |
| Density | 0.715 g/mL at 25°C (lit.) |
| Color | Colorless |
| Linear Formula | CH3(CH2)5CH=CH2 |
| Formula Weight | 112.22 |
| Physical Form | Clear liquid |
| Chemical Name or Material | 1-Octene |
| UN Number | UN3295 |
| Molecular Weight | 112.21 g/mol |
| SMILES String | CCCCCCC=C |
| Refractive Index | n20/D 1.408–1.409 (lit.) |
| CAS Number | 111-66-0 |
| EC Number | 203-893-7 |
| NACRES | NA.21 |
| PubChem Substance ID | 329830694 |
| UNSPSC Code | 12164502 |
| MDL Number | MFCD00009548 |
| InChI | 1S/C8H16/c1-3-5-7-8-6-4-2/h3H,1,4-8H2,2H3 |
| InChI Key | KWKAKUADMBZCLK-UHFFFAOYSA-N |
| Beilstein/REAXYS Number | 1734497 |
| Quality Level | 300 |
| Reference Assay | 98% |
| Biological Source | Synthetic |
| Organoleptic Profile | Camphoraceous |
| Food Allergen Status | No known allergens |
| FEMA Number | 4293 |
| Flavis Number | 1.070 |
1-Octene is a linear alpha-olefin — an eight-carbon chain with a terminal carbon-carbon double bond — produced synthetically and used at industrial scale across polymer and flavor manufacturing. Its terminal double bond makes it highly reactive in polymerization and metathesis chemistry, which is the basis for its most important industrial role as a comonomer.
1-Octene’s largest industrial application is as a comonomer in linear low-density polyethylene (LLDPE) manufacturing, where copolymerizing it with ethylene produces short-chain branching that improves film sealing properties and mechanical performance. It’s also a FEMA- and Flavis-listed flavoring substance with a camphoraceous organoleptic profile, used in flavor manufacturing, and it can serve as an indirect food additive in the production of food-contact packaging materials. In research, it’s studied as a substrate in olefin metathesis reaction mechanism investigations.
Sigma Aldrich’s GHS classification includes an aspiration hazard — Sarchem’s live page currently has zero safety information for this product.
