Akzo Nobel
Agrium U.S., Inc.
Atofina Chemicals, Inc.
Citgo Petroleum Corp.
Crown Technology, Inc.
Flexi-Liner Corp.
Geo Specialty Chemicals
Henkel Surface Technologies
ICL
IMC Minerals America
Jungbunzlauer, Inc.
Kemiron North America, Inc.
Kocour
Martin Marietta
Masktec
Nalco Municipal Division
Noveon

Norman Fox & Co.
Oakite Products, Inc.
Performance Products
Phibro-Tech, Inc.
PPG Industries, Inc.
Process Technology, Inc.
Rhodia
Serfilco – (Filter Equip.)
Simplot Industrial Products
Solvay Flourides, Inc.
Solvay Interox
Solvay Minerals, Inc.
Stone Chemical
Surtec International
Taskem, Inc.
The PQ Corp.
TMC Finishing Supply
Vulcan Materials Corp.