- Olin Corp
- Optima Chemicals
- Ortec Inc
- P Q Corp
- P Q Corp
- P Q Corp
- P Q Corp
- P Q Corp
- P Q Corp
- Packers' Chemical Inc
- Paper Chemicals Inc
- Passaic Color
- PCS Phosphate
- PCS Phosphate
- Peak Sulfur Inc
- Pennco Inc
- Permite Corp
- Permite Corp
- Perstorp Polyols Inc
- Persue Energy
- PGE Gas Transmission
- Phibro-Tech Inc
- Phibro-Tech Inc
- Phibro-Tech Inc
- Pioneer Chemicals Inc
- Porocel Corp
- Power Lab Inc
- Power Lab Inc
- Powerlab Inc
- Powerlab Inc
- Powerlab Inc
- PPG Industries Inc
- Pq Corp
- Pq Corp Specialty Div
- Prochem Inc
- Project Fire Safety Inc
- Prosco Inc
- Puma Technologies
- PVS Chemical
- PVS Chemical
- Q C Corp
- Q C Corp
- Quaker Chemical Corp
- Reagent Chemical & Research
- Reagent Chemical & Research
- Reagent Chemical & Research
- Reheis Inc
- Reheis Inc
- Reilly Industries Inc
- Releasagen Manufacturing Inc
- Research Chemicals Co
- Rohm & Haas Co
- Rohm & Haas Co
- Rohm & Haas Co
- Royal Oak Enterprises
- Saint Gobain Norpro
- Saint-Gobain Norpro
- Sanitized Inc
- Sasol North America Inc
- Scotch Corp
- Sea Lion Technology Inc
- Seaforth Mineral & Ore Co
- Seaforth Mineral & Ore Co
- Seaforth Mineral & Ore Co
- Separation Industries
- Share Corp
- Shepherd Chemical Co
- Sigma-Aldrich Corp
- Sno-Go Inc
- Sofix Corp
- Southern Ionics Inc
- Southern Ionics Inc
- Southern States Chemical
- Southern States Cooperative
- Southern Water Consultants Inc
- Specialty Chemical Mfg
- Src Inc
- Stepan Co
- Syntech Products Corp
- Technochem Inc
- Tessenderlo Kerley Ag
- Tetra Chemicals
- Tetra Chemicals
- Tetra Micro Nutrients
- Tetra Technologies Inc
- Thorn Smith Laboratories
- Tomah Products Inc
- Tosco Carbon Plant
- Trace Chemicals Inc
- Trace Chemicals Inc
- U S Aluminum Inc
- United States Aluminate
- Us Agri-Chemicals Corp
- Us Magnesium
- USEC Inc
- Vanchlor Co
- Vesuvius
- Virtex Chemical Corp
- WACO Chemical & Supply Co
- Walex Products
- Wilkinson Corp
- William H Harvey Co
- Witco Corp
- Wright Corp
- Y S Inc
- Zaclon Inc
- Zeochem
