| APAxcentria Pharmaceuticals LLC | Telford | PA | Chemical Manufacturing325412 | 1-19 | ◇ UNVERIFIED |
| GSGeo Specialty Chemicals Trimet Products Group | Allentown | PA | Chemical Manufacturing325110 | — | ◇ UNVERIFIED |
| HMHarry Miller CORP | Philadelphia | PA | Chemical Manufacturing325998 | 20-99 | ◇ UNVERIFIED |
| MCMilazzo Company | Pittston | PA | Chemical Manufacturing325998 | 1-19 | ◇ UNVERIFIED |
| NTNational Towelette Conmpany | Bensalem | PA | Chemical Manufacturing325620 | 20-99 | ◇ UNVERIFIED |
| AMAtomized Materials CO INC | Mcdonald | PA | Chemical Manufacturing325510 | 1-19 | ◇ UNVERIFIED |
| BCBasf CORP | Erie | PA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| BCBulk Chem INC | Reading | PA | Chemical Manufacturing325998 | 20-99 | ◇ UNVERIFIED |
| FGFine Grinding CORP. | Conshohocken | PA | Chemical Manufacturing325998 | 20-99 | ◇ UNVERIFIED |
| IIInolex INC | Philadelphia | PA | Chemical Manufacturing325192 | 100-499 | ◇ UNVERIFIED |
| MSMerck Sharp & Dohme CORP | Lansdale | PA | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PSPruett Schaffer Chem Co/pgh | Pittsburgh | PA | Chemical Manufacturing325510 | 1-19 | ◇ UNVERIFIED |
| RIRidgway Industries, INC. | Yeadon | PA | Chemical Manufacturing325320 | 1-19 | ◇ UNVERIFIED |
| SNSchutz NA LLC | Philadelphia | PA | Chemical Manufacturing325510 | 1-19 | ◇ UNVERIFIED |
| SCShore Chemical Company | Pittsburgh | PA | Chemical Manufacturing325611 | 1-19 | ◇ UNVERIFIED |
| 3A3m Aston | Aston | PA | Chemical Manufacturing325211 | — | ◇ UNVERIFIED |
| AIAccupac, INC. | Lansdale | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| ASAdvanced Skin Technologies, INC. | Bernville | PA | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| ATAdvanced Therapies, LLC | Philadelphia | PA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| AIAffival INC | Oakmont | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ATAgraco Technologies International | Dillsburg | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| APAgsalt Processing LLC | Gettysburg | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| ALAir Liquide America CORP Coatesville Asu | Coatesville | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAir Prod & Chem | Morrisville | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| APAir Products and Chemicals, INC. | Creighton | PA | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| ACAllegheny Chemical CORP | Ridgway | PA | Chemical Manufacturing325100 | — | ◇ UNVERIFIED |
| AHAmer Heterocyclic Research | Bradford | PA | Chemical Manufacturing325992 | — | ◇ UNVERIFIED |
| AIAmerican Iron Oxide CO - Allenport Facility | Allenport | PA | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| AVAmer Video Glass Co/mt Pleasant Plt | Mount Pleasant | PA | Chemical Manufacturing325193 | — | ◇ UNVERIFIED |
| APApozeal Pharm INC | Levittown | PA | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| AIApter Industries | Mckeesport | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| ACAqua Chemical Supply, INC | Millersburg | PA | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| ALAurorium LLC | Delaware Water Gap | PA | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| BPBayer Polymers LLC | Newtown Square | PA | Chemical Manufacturing325000 | — | ◇ UNVERIFIED |
| BUBayer USA INC | Pittsburgh | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| BDBellmeade Dry Clnr | Altoona | PA | Chemical Manufacturing325311 | — | ◇ UNVERIFIED |
| BOBerkebile Oil CO INC | Somerset | PA | Chemical Manufacturing325998 | 20-99 | ◇ UNVERIFIED |
| BPBerkley Prods CO | Akron | PA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BJB & J Group Inc/morrisville | Morrisville | PA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BIBostik INC | Huntingdon Valley | PA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| BPBradley Paint CO | Connellsville | PA | Chemical Manufacturing325510 | — | ◇ UNVERIFIED |
| BCBulk Chemical INC | Mohrsville | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| BCBulk Chemicals INC | Hamburg | PA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| BCBulk Chemicals, INC. | Shoemakersville | PA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| BCBulk Chemicals, INC. | Blandon | PA | Chemical Manufacturing325180 | — | ◇ UNVERIFIED |
| CICantol INC | Philadelphia | PA | Chemical Manufacturing325612 | — | ◇ UNVERIFIED |
| CCCapen Careful Clnrs | Harrisburg | PA | Chemical Manufacturing325310 | — | ◇ UNVERIFIED |
| CICargill, INC. - Salt Division | Mckees Rocks | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| CCCarlisle Construction Materials | Carlisle | PA | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| CRCastle Rubber Mfg | East Butler | PA | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |