Acetaldehyde

Acetaldehyde is a clear, colorless liquid or gas with a pungent, suffocating odor, widely used as a chemical intermediate and in laboratory research.​

Chemical Properties

Molecular formula: CH₃CHO (C₂H₄O)​

Molar mass: 44.05 g/mol​

Density: 0.784 g/cm³ at 20°C​

Boiling point: 20.2°C​

Melting point: -123.5°C​

Solubility: Miscible with water, ethanol, benzene, acetone; slightly soluble in chloroform​

Odor: Pungent, choking, or fruity aroma​

Laboratory Uses

Chemical synthesis precursor for acetic acid, peracetic acid, pentaerythritol, pyridine derivatives, and other compounds.​

Used in research studies for reaction mechanisms, chemical kinetics, and analytical calibrations (especially gas chromatography standards).​

Important for studying metabolic pathways and testing reagents (e.g., Schiff’s reagent for aldehyde detection).​

Safety and Handling

Highly flammable—keep away from ignition sources, sparks, and flames.​

Can cause respiratory, skin, and eye irritation; handle with gloves, goggles, and in well-ventilated spaces.​

Classified as a carcinogen, mutagen, and teratogen—use extreme caution and always follow lab safety protocols.​

Store in cool, dry, tightly-sealed containers away from oxidizers.​

Acetaldehyde is a vital reagent in chemical laboratories, valued for its reactivity and analytic utility, but it must be handled with strict safety measures due to its hazardous nature.