Used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and fine chemicals. It serves as a protective form of 3-hydroxybutyraldehyde, enabling selective reactions in multi-step syntheses. Commonly employed in the preparation of chiral building blocks for bioactive molecules, including vitamins and flavor compounds. Its acetal group enhances stability and solubility, making it suitable for use in acidic or aqueous reaction environments. Also utilized in the fragrance industry due to its ability to generate aldehyde-based aroma chemicals upon controlled deprotection.