Chemical Data Explorer (ChemDX) is a web-based chemistry-related research data platform provided by Korea Research Institute of Chemical Technology (KRICT). ChemDX provides four specialized data platforms open to public. (1) MatDX that can search and utilize material data, (2) ChemAI, an AI platform specialized in materials field, (3) KCB, chemicals data platform for drug development, and (4) MRA Toolkits that can predict the toxicity of chemical mixtures.