Users search by structure, reaction, or keyword and see papers, patents, and suppliers. Retrosynthesis tools suggest routes to a target molecule. Results link to the CAS registry.
Access is by subscription, usually through institutions.
Reaxys is the main alternative. SciFinder suits chemists doing literature and synthesis research.
// alternatives to CAS SciFinder see all →
// related tools in Research Tools
arXiv
Open-access preprint server for physics, math, and computer science
ATLAS.ti
Qualitative analysis software with AI-assisted coding
BioRender
Scientific illustration tool with a library of biology icons and templates
ChemDraw
Chemical structure drawing software
Findmypast
Genealogy records and family history search