?- Ashland
- Arkema
- BASF SE
- CP Kelco US Inc.
- DuPont
- Gantrade Corporation
- Kemira
- Kuraray Co. Ltd
- Merck KGaA
- Mitsubishi Chemical Corporation
- Nouryon
- Polysciences Inc.
- SNF Group
- Sumitomo Seika Chemicals Company