3-Methoxypropionic acid is primarily used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and agrochemicals. It serves as a building block for the synthesis of various compounds, including active pharmaceutical ingredients (APIs) and specialty chemicals. In the pharmaceutical industry, it is utilized in the development of drugs targeting specific therapeutic areas, leveraging its chemical structure for functional modifications. Additionally, it finds application in the production of herbicides and pesticides, where it contributes to the formulation of effective crop protection agents. Its role in polymer chemistry is also notable, as it can be used in the synthesis of specialty polymers with tailored properties for industrial applications.