Chemical Abstracts Plus (CAplus^SM) is the most current and comprehensive bibliographic database of chemical information available from Chemical Abstracts Service (CAS). CAplus is directly linked to its companion file CAS REGISTRY which is the broadest collection of chemical substance information worldwide. The CAS databases CAplus and CAS REGISTRY offer intellectually analyzed content obtained from journal and patent literature.

Content and coverage of CAplus
CAplus covers patent and journal article references from all areas of chemistry, biomedical sciences, engineering, materials science and agricultural science.
Coverage goes back to 1907. The file is updated daily and now contains

• about 6 million documents from patent publications of 50 patent-issuing authorities
• about 22 million documents from more than 9,000 international journals, technical disclosures, books, conference proceedings, dissertations, eviews, etc.
• patent references from 9 major patent authorities, available within 2 days of publication; records are fully indexed with in less than 27 days from the date of publication
• full coverage of the International Patent Classification (IPC 8)
• value-added content including substance-specific indexing (CAS REGISTRY numbers) and controlled vocabulary for concept information.

Content and coverage of CAS REGISTRY
CAS REGISTRY is the world's largest substance database covering substance information on all types of organic and inorganic substances, including polymers, alloys, coordination compounds, and mixtures. All substance records contain a unique CAS REGISTRY number (RN). Coverage starts in 1907. The file is updated daily and contains

• about 32 million organic and inorganic substances and about 60 million biosequences
• comprehensive substance information including chemical structures, trade names, systematic names, synonyms, and molecular formula
• calculated and experimental property data.

Your Benefit

• efficient and comprehensive retrieval of chemical
• substance information from patent and non-patent literature
• fast access to chemical patent information in English
• enhanced search results from thesaurus-supported subject searching

A sample record explained
The list of all 80 CAS Sections is available
Details on the patent coverage in CAS databases
A list of core journals coverage by CAS is available
User Documentation on the CAS Databases