http://www.chematch.com
2. ChemConnect
http://www.chemconnect.com
3. Chemdex
http://www.chemdex.com
4. Envera
http://www.envera.com
5. e-Chemicals.com
http://www.e-chemicals.com
6. ElastomerSolutions.com
http://www.elastomersolutions.com
7. SciQuest.com
http://www.sciquest.com
8. chemicalmarket.com
http://www.chemicalmarket.com
9. ChemicalBid.com
http://www.chemicalbid.com
10. Elemica
http://www.elemica.com