Released by Chemical Abstracts Service (CAS) and FIZ Karlsruhe, Web-based STN® delivers content, search power, and precision needed to understand and protect IP. Multiple databases and thesauri are complemented by such features as hit chemical structure displays, CAS Registry Number® highlighting, and INPADOC capabilities with family displays. Project-oriented workflow and intuitive interface enhance efficiency by integrating real-time analysis with query development and answer set review.