Benzaldehyde - Structure, Properties, Uses And FAQs - Vedantu

Benzaldehyde is a simple aromatic aldehyde, widely recognized for its almond-like aroma. Commonly found in nature and produced synthetically, benzaldehyde serves as an essential intermediate in the synthesis of dyes, perfumes, and flavoring agents. With distinct physical and chemical properties, it plays a crucial part in both industrial chemistry and organic synthesis.

Structure and Formula of Benzaldehyde

Understanding the molecular structure and composition of benzaldehyde helps explain its reactivity and uses:

Benzaldehyde Structure

• Benzaldehyde consists of a benzene ring attached to a formyl group (-CHO).
• Its molecular formula is \( C_7H_6O \).
• The condensed structural formula: \( C_6H_5CHO \).

This arrangement leads to a planar, aromatic structure, making benzaldehyde both stable and reactive in various chemical processes.

Physical and Chemical Properties of Benzaldehyde

Benzaldehyde exhibits unique characteristics significant for identification and application. Here’s a concise overview:

Physical Properties

• Benzaldehyde molar mass / molecular weight: 106.12 g/mol
• Benzaldehyde density: Approximately 1.04 g/cm3
• Benzaldehyde boiling point: Around 179°C
• Benzaldehyde melting point: -26°C
• Clear, colorless to yellowish liquid at room temperature.
• Intense, characteristic almond odor.

Its relatively low melting point makes benzaldehyde a liquid under normal conditions. When handling benzaldehyde, it is important to consult the relevant Benzaldehyde SDS for safety information.

Spectral Identification

• Benzaldehyde NMR: Characteristic peaks in both 1H and 13C NMR due to formyl and aromatic hydrogens/carbons.
• Benzaldehyde IR spectrum: Shows a strong absorption near 1700 cm-1 (C=O stretch) and signals in the aromatic region.

Chemical Behavior

• Readily oxidizes to benzoic acid with mild oxidants.
• Participates in nucleophilic addition reactions typical of aldehydes.
• Undergoes the Cannizzaro reaction (in concentrated alkali).

Applications of Benzaldehyde

Thanks to its versatility, benzaldehyde is employed across several industries:

• Synthesis of cinnamic acid and other organic molecules.
• Flavoring agents (imparting almond flavor in food).
• Ingredient in perfumes and fragrant products.
• Intermediate for dyes and pharmaceuticals.

The unique properties of benzaldehyde—like its distinct smell, reactivity, and role as a building block—contribute to its widespread utility.

Key Safety and Storage Information

Safe handling and storage are necessary due to benzaldehyde’s chemical nature:

• Store in tightly sealed containers, away from strong oxidizing agents.
• Work in well-ventilated areas and avoid inhalation or skin contact.
• Reference official Benzaldehyde SDS documents for comprehensive safety protocols.

For more insights on molecular behavior and measurement units, you can explore topics like the molecular nature of matter or check details about density units. If you're interested in physical state transformations, read about state changes in matter or deepen your understanding of material properties on Vedantu's resources.

In summary, benzaldehyde is a foundational aromatic compound with vast applications in the chemical industry. Recognizing its molecular weight (106.12 g/mol), structure, and characteristic spectral data (NMR and IR spectra) aids in its identification and safe usage. Knowledge of properties, such as density (1.04 g/cm³), melting, and boiling points, supports effective storage and practical applications. By understanding benzaldehyde’s formula and reactivity, chemists can safely handle and utilize this compound across numerous sectors. Always prioritize safety and further explore related chemical principles for a holistic grasp of such essential compounds.