N-Ethylthiourea is primarily used as an accelerator in the vulcanization process of rubber, enhancing the speed and efficiency of the curing process, which improves the durability and elasticity of rubber products. It is also employed in the synthesis of various organic compounds, serving as a building block in the production of pharmaceuticals and agrochemicals. Additionally, N-Ethylthiourea finds application in analytical chemistry as a reagent for detecting and quantifying certain metal ions, particularly in environmental and industrial samples. Its role in corrosion inhibition is notable, where it is used to protect metals from degradation in harsh chemical environments.