Pacifichem 2025 will be the ninth in the series of very successful Pacifichem Congresses. The Canadian Society for Chemistry (CSC) is the proud host society for the 2025 Congress. The theme of Pacifichem 2025 is “Building Communities to Address Global Challenges.” The Congress promotes scientific exchange in the Pacific Basin and will highlight recent contributions by chemical scientists that improve the quality of life in the Pacific Basin and throughout the world. Pacifichem 2025 will provide a superb scientific program and a unique opportunity for chemistry professionals from Pacific Basin countries to meet and explore common interests and perhaps enter into joint activities.