| Business | Phone |
| Metal Finishing Research Corp 4025 S Princeton Ave, Chicago 60609 | (773) 373-0800 |
| Rez Packaging 3735 S Racine Ave, Chicago 60609 | (773) 247-0800 |
| Occidental Chemical Corp 4201 W 69th St, Chicago 60629 | (773) 284-0079 |
| Pvs Chemicals Inc 12260 S Carondolet Ave, Chicago 60633 | (773) 933-8800 |