| cefic.be | European Chemical Industry Council (CEFIC) |
| emory.edu | International Society of Heterocyclic Chemistry |
| iupac.org | International Union of Pure and Applied Chemistry (IUPAC) |
| eurostar-science.org | European Society for Applied Physical Chemistry |
| efmc.ch | European Federation for Medicinal Chemistry (EFMC) |
| carotenoidsociety.org | International Carotenoid Society |
| cs.com | Ethiopian Chemical Society in North America (ECSNA) |
| chemistry.org | Green Chemistry Institute |
| unam.mx | International Organization for Chemical Sciences in Development |
| cdmaonline.org | Commercial Development and Marketing Association |
Belgium , Brussels Hoofdstedelijk Gewest , Brussels