Template:CasTemplate
- ChemIDplus
- DrugBank
- Sigma-Aldrich
- Alfa Aesar
- National Institute of Standards and Technology (NIST)
- Haz-Map
- PubChem
- ChemSpider
- chemBlink
- ChemSynthesis
- Chemical Entities of Biological Interest (ChEBI)
- Common Chemistry
- National Toxicology Program (NTP)
- IPCS INCHEM
- ChemSub Online
- Human Metabolome Database (HMDB)
- National Library of Medicine MeSH
- IARC Monographs
- Chemical Risk Information Platform (CHRIP)
- SIRI MSDS
- KNApSAcK Metabolite Information
- High Production Volume Information System (HPVIS)
- Korea Thermophysical Properties Databank (KDB)
- Entrez
- Google libri