| CGCn Group | Melrose Park | — | ◇ UNVERIFIED |
| CSCoated Sand Solutions LLC | Rochelle | — | ◇ UNVERIFIED |
| CCCommercial Cleanser CO | Schiller Park | — | ◇ UNVERIFIED |
| CCConsolidated Chemical Works LTD | Chicago | — | ◇ UNVERIFIED |
| CHCp Hall CO | Bedford Park | — | ◇ UNVERIFIED |
| CLCrawford Laboratories | Chicago | — | ◇ UNVERIFIED |
| CICrest Industries | New Lenox | — | ◇ UNVERIFIED |
| CMCristal Metals Inc-titanium Powder Plant | Ottawa | — | ◇ UNVERIFIED |
| CCCronus Chemicals LLC | Tuscola | — | ◇ UNVERIFIED |
| COCudner & O'connor CO | Chicago | — | ◇ UNVERIFIED |
| CCCustom Compounding Services LLC | Rockford | — | ◇ UNVERIFIED |
| DIDay International Chemical Products Div | Addison | — | ◇ UNVERIFIED |
| DJDepue/new Jersey Zinc/mobil Chemical CORP. | Depue | — | ◇ UNVERIFIED |
| DIDesoto INC - Chemical Products Div | Joliet | — | ◇ UNVERIFIED |
| DCDetrex CORP Solvent & Env Svc | Melrose Park | — | ◇ UNVERIFIED |
| DCDeveco CORP | Belvidere | — | ◇ UNVERIFIED |
| DMDfg Mercury CORP | Evanston | — | ◇ UNVERIFIED |
| DBDiamond Biofuels INC | Mazon | — | ◇ UNVERIFIED |
| DCDober Chemical CORP | Midlothian | — | ◇ UNVERIFIED |
| DADow Automotive | Kankakee | — | ◇ UNVERIFIED |
| DDDsm Desotech INC | Elgin | — | ◇ UNVERIFIED |
| DNDsm Nutritional Products INC | Naperville | — | ◇ UNVERIFIED |
| DPDupli-color Products | Elk Grove Village | — | ◇ UNVERIFIED |
| DSDurable Specialty Coatings | Chicago | — | ◇ UNVERIFIED |
| EZEagle Zinc CO | Hillsboro | — | ◇ UNVERIFIED |
| EFEarth Friendly Products | Wood Dale | — | ◇ UNVERIFIED |
| EFEarth Friendly Products | Addison | — | ◇ UNVERIFIED |
| EIEcolab INC | Morris | — | ◇ UNVERIFIED |
| EIEcolab INC | Cairo | — | ◇ UNVERIFIED |
| EIEcp INC | Bedford Park | — | ◇ UNVERIFIED |
| EMEmd Millipore CORP | Kankakee | — | ◇ UNVERIFIED |
| EHEmerald Hilton Davis LLC | West Chicago | — | ◇ UNVERIFIED |
| EIEndpoint INC | Rockford | — | ◇ UNVERIFIED |
| EPEngineered Polymer Solutions (eps) INC D | Tinley Park | — | ◇ UNVERIFIED |
| EPEngineered Polymer Solutions INC | Carol Stream | — | ◇ UNVERIFIED |
| EPEngineered Polymer Solutions INC | Chicago | — | ◇ UNVERIFIED |
| EIEnthone INC | Bridgeview | — | ◇ UNVERIFIED |
| ELEnvirox LLC | Danville | — | ◇ UNVERIFIED |
| ECEquistar Chemicals LP Tuscola Plant | Tuscola | — | ◇ UNVERIFIED |
| EPEssex Pb&r | Edwardsville | — | ◇ UNVERIFIED |
| ECEuclid Chemical Fire | Sheffield | — | ◇ UNVERIFIED |
| EEExplosives Energies a Division of Aee | Morris | — | ◇ UNVERIFIED |
| FBFitzpatrick Bros INC | Chicago | — | ◇ UNVERIFIED |
| FIFlexterra INC | Skokie | — | ◇ UNVERIFIED |
 Flextronics International USA | Buffalo Grove | — | ◇ UNVERIFIED |
| FIFlint Ink North America CORP | Carol Stream | — | ◇ UNVERIFIED |
| FIFlint Ink North America CORP | Salem | — | ◇ UNVERIFIED |
| FPFlorida Plastics International INC | Evergreen Park | — | ◇ UNVERIFIED |
| FCFmc Corporation | Chicago | — | ◇ UNVERIFIED |
| FRFml Resin Cutler | Cutler | — | ◇ UNVERIFIED |
