R&D Labs maybe for 557-21-1

• Shanghai Haoyuan Chemexpress Co., Ltd.

  website:https://www.chemexpress.com/

  Contact:86-21-58950125

  Address:No.3 Building, No.1999, Zhangheng Road, ZhangjiangHighTech Park, Shanghai, P.R.China,201203

• Shanghai Sunway Pharmaceutical Technology Co.,Ltd.

  Contact:+86-21-5161 3915

  Address:Shanghai YangPu

• Wuhan Yitongtai Science and Technology Co.,Ltd.

  Contact:+86-27-88933550

  Address:27th Fl. Bldg. 1, Shuian International Mansion, Heping Ave, Wuhan, Hubei, China

• XZL BIO-TECHNOLOGY CO., LTD.

  Contact:0086 533 2282832

  Address:Zibo，Shandong

• taicang liyuan chemical co,.ltd

  website:http://www.tcliyuanchem.com/productse.php

  Contact:86-512-53539583

  Address:Room 804,Huaxu Building,No.95,Renmin South Road,Taicang city,Jiangsu Province,China