13Propanedial

1,3-Propanedial, commonly known as malondialdehyde (MDA), is the simplest dialdehyde derived from propane, with the chemical formula C3H4O2. It is a linear three-carbon compound bearing aldehyde groups at both ends (OHC-CH2-CHO). The molecule is highly reactive due to its two aldehyde functionalities and can exist in hydrated forms in solution.

Biological and chemical relevance: Malondialdehyde is a major byproduct of lipid peroxidation, formed when polyunsaturated fatty acids undergo oxidative degradation. It can be found in trace amounts in various foods and biological fluids and may accumulate under conditions of oxidative stress. Because of its reactivity toward nucleophiles, MDA readily forms covalent adducts with proteins and DNA, a property that underlies its use as a biomarker of oxidative damage as well as concerns about potential mutagenic or cytotoxic effects.

Applications and measurement: In research and clinical contexts, MDA levels are commonly assessed as an index of lipid peroxidation. The thiobarbituric acid reactive substances (TBARS) assay is widely used, though chromatographic methods such as high-performance liquid chromatography (HPLC) and mass spectrometry provide more specific measurements. MDA quantification assists in studies of aging, cardiovascular disease, diabetes, and exposure to oxidative stressors.

Safety: Malondialdehyde is a reactive aldehyde and should be handled with appropriate precautions to avoid skin, eye, or respiratory exposure. It can form hazardous adducts with biomolecules and may be irritating at moderate concentrations.