| Business | Phone |
| Degussa Corp 1255 Roberts Blvd Nw, Kennesaw 30144 | (770) 418-8812 |
| Degussa Corp 1701 Barrett Lakes Blvd Nw, Kennesaw 30144 | (678) 797-4300 |
| Degussa Corp 2105 Barrett Park Dr Nw 108, Kennesaw 30144 | (770) 971-1317 |
| Demco Chemical Products Inc 2972 Kaley Dr Nw, Kennesaw 30152 | (770) 425-0785 |
| Resource Materials Corp 3210 Moon Station Rd Nw, Kennesaw 30144 | (770) 424-6300 |