NIST Chemistry Portal - "technology, measurement methods, and standards to address the needs of the chemical industry."
WebElements – "periodic table on the Web."
ChemIDPlus - National Library of Medicine databases on chemical safety and toxicity.
International Chemical Safety Cards - "summarizes essential health and safety information on chemicals for their use at the "shop floor" level by workers and employers in factories, agriculture, construction and other work places."
NIOSH Pocket Guide to Chemical Hazards - "source of general industrial hygiene information on several hundred chemicals/classes for workers, employers, and occupational health professionals."
SCIENCE.GOV – "provides a search of over 55 scientific databases and 200 million pages of science information with just one query, and is a gateway to over 2100 scientific Websites."
American Chemical Society - "congressionally chartered independent membership orgainization which represents professionals at all degree levels in all fields of chemistry and sciences that involve chemistry."
The National Academies - "produces groundbreaking reports that have helped shape sound policies, inform public opinion, and advance the pursuit of science, engineering, and medicine."
Linus Pauling research notebooks - "include forty-six research notebooks spanning the years of 1922 to 1994 and covering any number of the scientific fields in which Dr. Pauling involved himself."
Hazardous substances data bank (HSDB) - "focuses on the toxicology of potentially hazardous chemicals."