American Chemical Society: ChemCenter -- Information on chemicals from American Chemical Society.

Chem Web -- "The Worldwide Club for the Chemical Community"

Chemistry -- Open Directory Project

Chemistry Hypermedia Project -- Online resources for students, educators and scientists

Chemistry Information via the Internet -- U.S. FDA/CFSAN

Chemistry Webercises Directory -- "designed as a directory for a limited number of educational chemistry resources on the internet."

Chemistry Webbook -- NIST
Broad coverage of chemistry from experts. Includes chemical and physical property data for chemical species.

EnvironmentalChemistry.com

Google Web Directory: Chemistry

InfoSurf: Chemistry

Organic Chemistry Resources Worldwide -- "an intuitive WWW resource guide for synthetic organic chemists". (Georgia State Univ. Chemistry Dept.)

Resources for Chemistry Education

WebElements -- "The Periodic Table for scholars on the WWW

WWW chemistry sites at academic institutions

Yahoo!: Chemistry