Glossary of petroleum and energy terminology. Explanations in Japanese, (potentially suspect) glosses in English.

A bilingual glossary of more than 25,000 compounds. The search interface allows boolean operators. Thanks to Zachary Braverman for the original entry.

The International Union of Pure and Applied Chemistry website has a series of documents of IUPAC recommendations for nomenclature. Includes a full database search.

Thanks to Zachary Braverman for the original description.