1.UBE Industries LTD.
2.Shandong Shida Shenghua Chemical Group Co. Ltd.
3.KOWA American Corporation
4.Qingdao Aspirit Chemical Co. Ltd.
5.Shandong Haike Chemical Industry Group Co Ltd.
6.Shandong Depu Chemical Industry Science & Technology Co. Ltd.
7.Dongying City Longxing Chemical Co. Ltd.
8.Shandong Feiyang Chemical Co. Ltd.
9.Alfa Aesar
10.Hefei TNJ Chemical Industry Co. Ltd.