Alguns repositórios na web sobre Química

• http://hazard.com/msds/index.php
• http://webbook.nist.gov/chemistry/
• http://www.eric.ed.gov/
• http://www.feiradeciencias.com.br/
• http://pubchem.ncbi.nlm.nih.gov/
• http://www.emolecules.com/
• http://www.alanwood.net/pesticides
• http://www.ebi.ac.uk/nmrshiftdb/
• http://depth-first.com/articles/2007/01/24/thirty-two-free-chemistry-databases