Reaxys is a unique web-based chemistry database consisting of deeply excerpted compounds and related factual properties, reaction and synthesis information as well as bibliographic data, navigated and displayed via an actionable interface.[1]

SciFinder-n access now uses your University of York IT credentials only. CAS SciFinder is the world's most current and relied on source for chemical substance information. with details on chemical substances and their related chemical structures, chemical names, regulatory information, and properties, including CAS Registry Numbers®.[2]

Web of Science Core Collection is the world's leading citation database. It contains records of articles from the highest impact journals worldwide—including open access journals— conference proceedings and books. [3]

SDBS is an integrated spectral database system for organic compounds,which includes 6 different types of spectra under a directory of the compounds. [4]

ChemExper is a commercial data base for molecular data. The search results include a two-dimensional structure diagram and a mole file for many compounds. [5]

The Physical Sciences Data-science Service is a new National Research Facility which brings together tools and resources for UK researchers in physical sciences, including chemistry, crystallography, materials and related fields. It provides access to web-based data services which are freely accessible for academic users from the UK [6]