Certified to ISO 9001 and FAMI-QS, Shandong Dafn Chemical Co.,Ltd. has been specialized in supplying mineral nutrients and water treatment chemicals over the last decades and has become the largest supplier of trace minerals from China.DAFN registered its products in the feed and fertilizer authorities in many countries. "DAFN", the trademark registered in China and many foreign countries, was honored as an "International Well-Know···