J & K SCIENTIFIC LTD.
Telephone010-82848833 400-666-7788
Websitehttp://www.jkchemical.com
Changzhou Hopschain Chemical Co.,Ltd.
Telephone0519-85528066 13775048983
Websitehttp://www.hopschem.com/
Shenzhen Polymeri Biochemical Technology Co., Ltd.
Telephone+86-400-002-6226 +86-13028896684;
Websitehttps://www.rrkchem.com
Hefei Mokai Pharmaceutical Technology Co., Ltd
Telephone 18130062233
Websitehttp://www.yxjchem.com/
Henan Dowon Chemical Technology Co., Ltd.
Telephone 16696119288
Websitehttp://www.dowon.com.cn