| PCPressure Chem Co/pgh | Pittsburgh | PA | — | ◇ UNVERIFIED |
| PCPssi Chemical Innovations | Kieler | WI | — | ◇ UNVERIFIED |
| PCPt Central Machine and Tool Company | Enid | OK | — | ◇ UNVERIFIED |
| PTPurification Techs INC | Chester | CT | — | ◇ UNVERIFIED |
| RFReal Fleet Solutions, LLC | Cocoa | FL | — | ◇ UNVERIFIED |
| RAReg - Albert Lea | Albert Lea | MN | — | ◇ UNVERIFIED |
| RNReg Newton, LLC | Newton | IA | — | ◇ UNVERIFIED |
| RBRenewable Bio Fuels | Port Neches | TX | — | ◇ UNVERIFIED |
| REResinoid Engineering CORP | Skokie | IL | — | ◇ UNVERIFIED |
| RARevitalizing Auto Communities Environmental Response Trust | Anderson | IN | — | ◇ UNVERIFIED |
| RCRho Chemicals CO | Joliet | IL | — | ◇ UNVERIFIED |
| RJR J Marshall CO | Erie | MI | — | ◇ UNVERIFIED |
 Rochester Midland CORP | Montgomery | IL | — | ◇ UNVERIFIED |
| RSRochester Silver Works LLC | Rochester | NY | — | ◇ UNVERIFIED |
| RIRöchling Industrial Cleveland (1318544510) | South Euclid | OH | — | ◇ UNVERIFIED |
| RLRockwood Lithium INC | Silverpeak | NV | — | ◇ UNVERIFIED |
| RARohm and Haas - Hayward Plant | Hayward | CA | — | ◇ UNVERIFIED |
| RGRousselot Gelatine | Peabody | MA | — | ◇ UNVERIFIED |
| SISeeler Industries INC | Joliet | IL | — | ◇ UNVERIFIED |
| SCSepton Company of America | Pasadena | TX | — | ◇ UNVERIFIED |
| SFSes Foam | Spring | TX | — | ◇ UNVERIFIED |
| STSe Tylose USA INC. and Its Affiliates | Plaquemine | LA | — | ◇ UNVERIFIED |
| SEShaw El Dorado, LLC | El Dorado | AR | — | ◇ UNVERIFIED |
| SCShell Catalysts and Technologies L.p. | Port Allen | LA | — | ◇ UNVERIFIED |
| SASigma - Aldrich Co-sigma Chemical Company | Saint Louis | MO | — | ◇ UNVERIFIED |
| SPSlide Products INC | Wheeling | IL | — | ◇ UNVERIFIED |
 Southern Ionics INC | Sulphur | LA | — | ◇ UNVERIFIED |
| STSpartech Townsend | Pleasant Hill | IA | — | ◇ UNVERIFIED |
| SMSpecial Metals | Princeton | KY | — | ◇ UNVERIFIED |
| SPSpecialty Polymers | Woodburn | OR | — | ◇ UNVERIFIED |
| SCStabond CORP | Gardena | CA | — | ◇ UNVERIFIED |
| SCSyntech Chemicals | Houston | TX | — | ◇ UNVERIFIED |
| TMTaylor Made Group LLC | Gloversville | NY | — | ◇ UNVERIFIED |
| TATeknor Apex Thermoplastic | Leominster | MA | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley, INC. | Hanford | CA | — | ◇ UNVERIFIED |
| TTTetra Technologies - Chemical Division | West Memphis | AR | — | ◇ UNVERIFIED |
| TDThe Dow Chemical CO | Wilmington | IL | — | ◇ UNVERIFIED |
| TFThermo Fisher Scientific (milwaukee) LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
| TFThermo Fluids INC | Woods Cross | UT | — | ◇ UNVERIFIED |
| TCThird Coast Terminals | Pearland | TX | — | ◇ UNVERIFIED |
| TCTower Chemical Corporation | Easton | PA | — | ◇ UNVERIFIED |
| TCTransene Company Oakland | Oakland | CA | — | ◇ UNVERIFIED |
| TLTwin Lake Chemical, INC. | Lockport | NY | — | ◇ UNVERIFIED |
| TSTwin State INC | Janesville | WI | — | ◇ UNVERIFIED |
| TSTwin State INC | Hampton | IA | — | ◇ UNVERIFIED |
| UPUltra Pure Solutions INC | Carrollton | TX | — | ◇ UNVERIFIED |
| UPUltra Pure Solutions INC | Castroville | CA | — | ◇ UNVERIFIED |
| UPUnited Precious Metal Refining | Alden | NY | — | ◇ UNVERIFIED |
| ULUop LLC - Baton Rouge Plant | Baton Rouge | LA | — | ◇ UNVERIFIED |
| UBUS Borax INC | Wilmington | CA | — | ◇ UNVERIFIED |
