The chemical periodic table. Information on elements - atomic weight, energies, reactions etc. A directory for chemists - universities, institutes, government agencies, companies, societies, databases, discussion groups, news groups. There is information for specialised subject areas, such as biological or organmetallic chemistry, and database access. A searchable database, using common chemical names, CAS registry numbers, formulae, structures etc.
Retrievable information includes melting point, specific gravity, vapour density.
Links to other Internet databases. You need to join, but registration is free.