Chemical Properties
| Definition | A fatty acid with acetylenic triple bonds at the 9 and 11 positions. |
| Appearance | Crystals.Readily polymerizes and may explode on rapid heating to 250C. Soluble in acetone and alcohol. Turns red on exposure to air and heat. |
| Melting point | 39.5° |
| Boiling point | 433.28°C (rough estimate) |
| density | d445 0.9309; d460 0.91966; d478 0.9095 |
| refractive index | nD50 1.49148; nD78 1.4860 |