| Air Liquide |
| Air Products |
| ArcelorMittal (formerly Bayou Steel) |
| Chemtura (now Galata Chemicals) |
| Cornerstone Chemical Company (formerly Cytec) |
| Cytec (now Cornerstone Chemical Company) |
| DuPont |
| DuPont Performance Elastomers |
| Entergy |
| Evonik |
| Galata Chemicals (formerly Chemtura) |
| Hexion (now Momentive) |
| Marathon Petroleum Company |
| Momentive (formerly Hexion) |
| Monsanto |
| Motiva |
| Nalco Company |
| Noranda |
| OxyChem (Occidental Chemical) |
| Shell |
| Valero |
