Octanal, with the chemical formula C8H16O and CAS number 124 - 13 - 0, is an aldehyde compound. It appears as a colorless to slightly yellowish liquid with a strong, fatty - citrusy odor. The molecular weight of octanal is approximately 128.21 g/mol. Its boiling point is around 163 - 165 °C, and the melting point is about - 23 °C. It has a relative density of 0.822 g/mL at 25 °C. Octanal is insoluble in water but soluble in organic solvents such as ethanol, ether, and chloroform. It is a naturally occurring compound found in various essential oils, including citrus oils and some floral oils.
1. **Fragrance Industry**: Octanal is widely used in the fragrance industry due to its pleasant, citrus - like scent. It can be used as a key ingredient in perfumes, colognes, and other scented products. It adds a fresh and uplifting note, often used in citrus - themed and floral - citrus blends.
2. **Flavor Industry**: In the food and beverage industry, octanal is used as a flavoring agent. It can impart a citrusy, orange - like flavor to products such as soft drinks, candies, and desserts. However, it is used in very small quantities as its flavor is quite intense.
3. **Chemical Synthesis**: It serves as an important intermediate in organic synthesis. It can be used in the production of other chemicals, such as alcohols, esters, and amines, through various chemical reactions like reduction, oxidation, and condensation reactions.
When handling octanal, it is essential to follow safety procedures. Wear appropriate personal protective equipment, including gloves and safety goggles.
1. **In Fragrance Formulation**: When using octanal in perfume or fragrance creation, start with a small amount, typically less than 5% of the total formula. Gradually increase the concentration while testing the fragrance on a smelling strip or a skin patch to achieve the desired scent intensity. It can be mixed with other fragrance ingredients in a suitable solvent, such as ethanol.
2. **In Flavoring**: In the food industry, octanal should be diluted in an appropriate carrier, such as propylene glycol or ethanol, before use. The recommended usage level in food products is usually in the range of a few parts per million to prevent overpowering the flavor.
3. **In Chemical Synthesis**: In a laboratory or industrial setting, octanal should be stored and handled in a well - ventilated area. When using it in chemical reactions, follow the specific reaction conditions and procedures described in the relevant chemical literature. Use appropriate reaction vessels and equipment, and ensure proper temperature and pressure control.
1. **Fragrance Company Case**: A well - known fragrance company was developing a new citrus - floral perfume. They incorporated octanal as a top - note ingredient. By carefully adjusting the concentration of octanal to 3% of the total formula, they were able to create a fresh and long - lasting citrusy opening for the perfume. Consumer feedback showed that the perfume was well - received for its vibrant and natural - smelling citrus notes.
2. **Food Manufacturer Case**: A food manufacturer wanted to add an orange - like flavor to a new line of soft drinks. They used octanal diluted in propylene glycol at a concentration of 5 ppm. After sensory evaluation, the soft drinks were found to have a pleasant and authentic orange flavor, which increased the product's marketability.
3. **Chemical Synthesis Case**: In a chemical research laboratory, octanal was used as a starting material for the synthesis of a new alcohol compound. By reacting octanal with a reducing agent under specific reaction conditions (such as using sodium borohydride in an ethanol solvent at room temperature), they were able to achieve a high yield of the desired alcohol product. This new alcohol could be further used in the synthesis of more complex organic compounds.
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