HELM AG (Germany)
DOMO Chemicals (Belgium)
Nutrient Ltd (Canada)
OCI Nitrogen (The Netherlands)
AdvanSix (US)
ArcelorMittal (Luxembourg)
Vertellus Holdings LLC (US) and GAC CHEMICAL (US)
Royal DSM (The Netherlands)
Honeywell International Inc (US)
BASF SE (Germany)
Sumitomo Chemical Co. Ltd (Japan)
Merck KGaA (Germany)
Evonik Industries AG (Germany)
LANXESS (Germany)