Chemical Databases
http://www.cas.org/ (Rank: 30884)
http://pubchem.ncbi.nlm.nih.gov/ (Rank: 62932)
http://www.chemspider.com/ (Rank: 77175)
http://webbook.nist.gov/chemistry/ (Rank: 80569)
http://www.chemexper.com/ (Rank: 87042)
http://riodb01.ibase.aist.go.jp/sdbs/ (Rank: 95311)
http://orgsyn.org (Rank: 109763)
http://www.mdli.com (Rank: 110906)
http://www.chemsources.com/ (Rank: 154415)
http://www.emolecules.com (Rank: 158499)
http://www.ddbst.de (Rank: 191795)
http://chem.sis.nlm.nih.gov/chemidplus/ (Rank: 210793)
http://www.reciprocalnet.org (Rank: 285559)
http://ccinfoweb.ccohs.ca/ (Rank: 287807)
http://chemnetbase.com (Rank: 356914)
http://www.iumsc.indiana.edu (Rank: 455172)
http://zinc.docking.org (Rank: 516336)
http://ull.chemistry.uakron.edu/erd/ (Rank: 584768)
http://www.infochem.de (Rank: 585948)
http://ftirsearch.com (Rank: 642938)