Scopus is an abstract and citation database of research literature and quality web sources , including journals, conference proceedings, trade publications, abstracts, and patent records. It is a multidisciplinary resource covering materials from the humanities, sciences and social sciences. Scopus allows you to locate the most highly cited items and the articles that cite them.
SciFinder Scholar contains a comprehensive database of chemical and chemical engineering literature including patents (1907 - date, with selected coverage back to 1878) and the CAS Registry with information on 18 million substances. Also useful for biotechnology, toxicology, environmental science, medicine, food science and nuclear science.
CRC Handbook of Chemistry and Physics is a major source of chemical and physical property data. It includes information on elements, inorganic compounds, organic compounds, physical constants, units and conversion factors, symbols, and nomenclature.