Benzaldehyde[2]
Overview
Benzaldehyde is the simplest aromatic aldehyde, consisting of a benzene ring with a formyl substituent. It occurs naturally in almonds, cherries, and other plants, contributing to their characteristic aromas. Industrially, it is synthesized via the oxidation of toluene or benzyl chloride. As a versatile intermediate, benzaldehyde is a precursor to numerous compounds, including dyes, perfumes, and pharmaceuticals. Its almond-like scent makes it valuable in flavorings and fragrances, though synthetic alternatives are often used due to cost and stability considerations.
Physical and Chemical Properties
Benzaldehyde is a colorless to pale yellow liquid with a distinct almond-like odor. It is slightly soluble in water but mixes well with most organic solvents like ethanol and ether. The compound is volatile and flammable, with a flash point of 62 °C. Chemically, benzaldehyde is reactive due to its aldehyde group. It undergoes typical aldehyde reactions, such as oxidation to benzoic acid and reduction to benzyl alcohol. It also participates in condensation reactions, making it useful in synthesizing dyes and pharmaceuticals.
Main Applications
Benzaldehyde is primarily used in the flavor and fragrance industry, where it imparts an almond-like aroma to foods, cosmetics, and soaps. It is a key ingredient in synthetic almond oil and cherry flavorings. In the pharmaceutical industry, benzaldehyde serves as an intermediate for drugs like chloramphenicol and ephedrine. It is also used in dye manufacturing, particularly for aniline dyes, and as a solvent for resins and cellulose esters.
Safety and Storage
Benzaldehyde is moderately toxic and can cause irritation to the skin, eyes, and respiratory tract. Prolonged exposure may lead to headaches or dizziness. Proper ventilation and personal protective equipment (PPE) are recommended when handling this chemical. Store benzaldehyde in tightly sealed containers away from heat and oxidizers. It should be kept in a cool, dry, well-ventilated area to prevent degradation and minimize fire hazards.
B2B Procurement Guide
When procuring benzaldehyde, prioritize suppliers with certifications like ISO or GMP, especially for pharmaceutical or food-grade applications. Verify the purity level (typically 98-99.5%) and request safety data sheets (SDS). Bulk purchases (drums or tankers) often reduce costs, but ensure proper storage facilities are available. Prices vary based on purity and market demand, with industrial-grade benzaldehyde commonly priced between $3 and $8 per kilogram.
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