(4Z)-4-Heptenal(CAS: 6728-31-0)

(4Z)-4-Heptenal is a colorless liquid with a pungent, greenish odor. It has a molecular weight of 110.19 g/mol and a density of 0.89 g/cm³. This compound is slightly soluble in water but soluble in organic solvents. It is not highly reactive under normal conditions but can undergo oxidation to form ketones. It has a pKa of 16.2 and a boiling point of 156°C. It is stable under normal storage conditions but should be protected from light.

(4Z)-4-Heptenal is commonly synthesized using a Wittig reaction where a phosphonium ylide reacts with 4-heptenyl bromide. The reaction typically yields a 70-80% yield under mild conditions. Other methods include the reduction of 4-heptenaldehyde or the oxidation of 4-heptenol. The reaction is usually carried out in the presence of a suitable base and solvent.

(4Z)-4-Heptenal is used in the fragrance and flavor industry due to its characteristic green, leafy aroma. It is also used in the food industry as a flavoring agent. In the pharmaceutical industry, it is utilized as a starting material for the synthesis of other compounds. Additionally, it is sometimes used in the polymer industry and chemical research as a reagent. Its applications in sensors and semiconductors are less common but are being explored for their potential in these fields.

When handling (4Z)-4-Heptenal, it is important to use appropriate personal protective equipment (PPE), including safety glasses and gloves. It should be stored in a cool, dry place, away from heat and direct sunlight. In case of a spill, it should be handled using appropriate spill kits and collected for proper disposal. It is recommended to keep the material safety data sheet (MSDS) or safety data sheet (SDS) readily available for reference. The compound is not highly toxic, but inhalation or ingestion can cause irritation and should be avoided. Proper ventilation should be maintained during handling.