heptanal

Heptanal, also known as enanthaldehyde, is an aliphatic straight-chain aldehyde with seven carbon atoms. Its chemical formula is C7H14O and its molecular weight is about 114.1 g/mol. It is a colorless liquid at room temperature and has a characteristic aldehydic odor that is typical of many short- to medium-chain aldehydes.

Physically, heptanal is a colorless liquid with a relatively high boiling point for a small aldehyde, around 150°C. Its density is about 0.8 g/mL at 25°C. It is sparingly soluble in water but dissolves readily in many organic solvents such as ether, ethanol, and benzene, making it useful in organic synthesis and formulation work.

Production and occurrence: Industrially, heptanal is produced mainly by hydroformylation (oxo process) of 1-hexene to give heptanal, followed by purification. It can also be obtained by partial oxidation of n-heptanol. In addition to its role as an intermediate, heptanal is used in fragrance and flavor chemistry as a building block for more complex aroma compounds.

Uses: The primary applications of heptanal are as a fragrance ingredient and as a flavor compound, where it contributes to fruity and green notes. It also serves as a chemical intermediate for the synthesis of esters, alcohols, and other fine chemicals used in various industries, including fragrances, flavors, and polymers.

Safety: Heptanal is a flammable liquid and can irritate the eyes, skin, and respiratory tract. It should be handled in a well-ventilated area with appropriate personal protective equipment; keep it away from heat, sparks, and oxidizers and store in a tightly closed container.