1. Amsyn Inc.
2. Anhui Dongfeng Chemical Co. Ltd.
3. GFS Chemicals Inc.
4. Hibrett Puratex
5. Honeywell International Inc.
6. Hubei Shunhui Bio-Technology Co. Ltd.
7. Indian Oxalate Ltd.
8. Merck KGaA
9. Mudanjiang Fengda Chemical Co. Ltd.
10. Noah Chemicals
11. Oxaquim SA
12. ProChem Inc.
13. Punjab Chemicals and Crop Protection Limited
14. Reagents
15. Ricca Chemical Company
16. Rockleigh Industries
Inc
17. Shandong Fengyuan Chemical Co. Ltd.
18. Spectrum Chemical Mfg. Corp.
19. Star Oxochem Pvt. Ltd.
20. Sun Chemical
21. UBE Corporation
22. Ultra Chemical Works
23. Uranus Chemicals Co. Ltd