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 Chemistry, Clinical Chemistry, Drugs, MSDS 

General Chemistry Categories:

• WWW Virtual Library-Chemistry
• General Chemistry Resources
• Chemical Information Resource
• Chemistry links and Resources
• American Chemical Society
• American Chemical Society & Chemical Abstract Services
• Martindale's 'The Reference Desk: WW Overview
• A Tutorial for High School Chemistry
• Internet Chemistry Resources
• Chemistry Hypermedia Project
• Global Instructional Chemistry
• Chemistry Department at Sheffield

Clinical Chemistry, Toxicology, and Others:

• Clinical Chemistry Resources
• AACC - Clinical Chemistry
• National Toxicology Program
• National Center for Toxicological Research Gopher
• Chemical Industry Institute of Toxicology

Chemical, Drugs, and Others:

• Chemical Finder
• Rolf Claessen's Chemistry Index
• The Virtual Pharmacy Center
• Drug Discovery Informatics
• FDA Drug Information
• RxList - The Internet Drug Index
• PharmWeb
• Pharmaceutical Online

MSDS:

• MSDS
• Chemical Health and Safety Data
• US Environmental Protection Agency

Others:

• Greeks, Superscripts, Subscripts
• Chemistry Softwares