Chemical Database Linker for Chemicals and Chemical Substances [Japanese]
ChemFinder ChemExper NIST Chemistry WebBook
which used a CAS Registry Number.
In addition, it is a translator from English to Japanese.
Click first character (not word) of chemicals, you can see list of chemicals.
Enter a Chemical Name, CAS Number(example acetone,アセトン,あせとん,硫酸,71-55-6)