PubChem Project (NIH.gov)
Hosted by the National Institutes of Health. Provides incredible wealth of information on the material. Results include safety/toxicity, literature links, physical data, and more.
Material Safety Data Sheets (MSDS)
MSDS provide workers and emergency personnel with procedures for handling a particular substance. Data includes physical properties, toxicity, reactivity, etc.
IPCS Inchem
Chemical Safety Information from Intergovernmental Organizations Provides access to internationally peer reviewed information on chemicals commonly used throughout the world, e.g., pesticides, poisons, carcinogens, food contaminants.
