ACS Division of the History of Chemistry
The division's interest is the history of the chemical sciences and technologies and their allied disciplines. The division supports programs and symposia at ACS national meetings and publishes the Bulletin for the History of Chemistry, a leading journal for the publication of historical research in chemistry and allied sciences.
http://www.scs.uiuc.edu/~mainzv/HIST/index.php

Chemical Heritage Foundation
Explore the fascinating history of chemistry. The Chemical Heritage Foundation website is an excellent online resource for the study of the history of Chemistry. The site provides a clear and well-presented introduction for students new to the field as well as offering resources for teachers and researchers. This is one of the foremost websites devoted to the history of chemistry, and should prove a useful resource for those teaching and working in this field.
http://www.chemheritage.org

Chemistry: A Historical Perspective
James Fromm's historical perspective of chemistry, organized thematically, describes many important developments in chemistry from alchemy to modern nuclear transmutation.
http://www.3rd1000.com/history/contents.htm

The Alchemy Web Site
The Alchemy website and virtual library is an extensive resource relating to the historical study of alchemy. The site is maintained by Adam McLean and relies on contributions from interested individuals. The collection has over 100 megabytes of data spread, over 2000 images and over 1,300 sections. This is an extremely comprehensive site, of use to researchers at all levels, although slightly overwhelming in its enormous content. Time is needed to consider its resources thoroughly.
http://www.levity.com/alchemy/