(S)-(-)-1,2,4-Butanetriol is primarily used as a chiral building block in the synthesis of pharmaceuticals and fine chemicals. Its three hydroxyl groups make it a versatile intermediate for creating complex molecules, particularly in the production of antiviral and anticancer agents. It is also employed in the development of biodegradable polymers and as a precursor for specialty chemicals in the agrochemical industry. Additionally, it finds application in the formulation of personal care products, where it acts as a humectant and moisturizer due to its ability to retain water. Its chiral nature is particularly valuable in asymmetric synthesis, enabling the production of enantiomerically pure compounds.