| BLBiologos LLC | Montgomery | IL | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| BFBiovantage Fuels LLC | Belvidere | IL | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| BGBoc Gases | Romeoville | IL | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| BCBorden Chemical Forest Park Plant | Forest Park | IL | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| BMBrady Mccasland INC | East Saint Louis | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| BMBrenntag Mid South INC | East Saint Louis | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| BLBridgeport Landings LLC | Chicago | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CICabery, Il | Cabery | IL | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| CMCabot Microelectronics CORP | Aurora | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CGCameron Great Lakes | Batavia | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CCCandy & CO | Chicago | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CCCandy & CO | Chicago | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CPCarbit Paint CO | Chicago | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| CICasey, Il | Casey | IL | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| CCCedar Concepts INC | Chicago | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CLCelanese Ltd-meredosia Facility | Meredosia | IL | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| CCCelta Chemical | Granite City | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CCCenterbridge Capital Partners Iii, L.p. | Riverdale | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CIChemstream INC Midwest Branch | West Frankfort | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CAChemtura Agrosolutions -trace Chemicals | Pekin | IL | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| CQChicagoland Quad Cities Express, INC. - Bridgeview | Bridgeview | IL | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| CMChicago Metallic Corp-interfinish Plant | Bridgeview | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CSChicago Specialties, LLC | Chicago | IL | Chemical Manufacturing325100 | — | ◇ UNVERIFIED |
| CMChilo Manufacturing & Plating Company | Chicago | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CCChroma CORP | Mchenry | IL | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| CLChroma Liquid Color CORP | Chicago Heights | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| CJC J R Processing CO | Des Plaines | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CMClaire Manufacturing | Addison | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CClariant | Mchenry | IL | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| CMClarke Mosquito Control | Roselle | IL | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
 Clarke Mosquito Control Products INC. | Schaumburg | IL | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| CPClorox Products | Chicago | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CSClorox Sales CO | Minooka | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CICmic INC | Skokie | IL | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| CGCn Group | Melrose Park | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| CSCoated Sand Solutions LLC | Rochelle | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CCCommercial Cleanser CO | Schiller Park | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| CCConsolidated Chemical Works LTD | Chicago | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CHCp Hall CO | Bedford Park | IL | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| CLCrawford Laboratories | Chicago | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| CICrest Industries | New Lenox | IL | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| CCCronus Chemicals LLC | Tuscola | IL | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
| COCudner & O'connor CO | Chicago | IL | Chemical Manufacturing325910 | — | ◇ UNVERIFIED |
| CCCustom Compounding Services LLC | Rockford | IL | Chemical Manufacturing325991 | — | ◇ UNVERIFIED |
| DIDay International Chemical Products Div | Addison | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| DJDepue/new Jersey Zinc/mobil Chemical CORP. | Depue | IL | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
| DIDesoto INC - Chemical Products Div | Joliet | IL | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| DCDetrex CORP Solvent & Env Svc | Melrose Park | IL | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| DCDeveco CORP | Belvidere | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| DMDfg Mercury CORP | Evanston | IL | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
