http://www.atsdr.cdc.gov/toxfaq.html

ATSDR ToxFAQs is a series of summaries abouthazardous substances . Each fact sheet serves as a quick and easy to understand guide. Answers are provided to the most frequently asked questions (FAQs) about exposure to hazardous substances found around hazardous waste sites and the effects of exposure on human health, and show Chemical Abstracts Service - CAS - number, chemical formula, 3D images (special plug-ins are required), National Fire Protection Association - NFPA - hazard label key, and Vermont SIRI MSDS Archive safety card or University of Utah material safety data sheet.