There are numerous other sites, many linked to these, that also provide reliable information. Reliable information is essential to performing credible research, so it is a good idea to check out websites and try to determine if the authors represent a recognized authority or organization. Chemdex provides a directory of chemistry on the internet. Chemfinder provides a search mechanism for finding information about chemical compounds. Extoxnet is a database designed by toxicologists and chemists to provide information on pesticides.
Galaxy provides links to sites in a number of chemistry disciplines.
Internet Detective is an interactive tutorial on evaluating the quality of Internet resources. Links for Chemists is an index with over 5800 links to chemistry websites. Molecular Weight Calculation is a simple calculator for determining the molecular weights of compounds. National Academy Press provides the full text of a number of chemistry related publications. Virtual Library provides links to academic institutions, organizations and other web resources in chemistry.