Changzhou Qidi Chemical Co., Ltd is located in the center of Yangtze Delta, which is adjacent to Shanghai. We focus on the production of ammonium persulfate, sodium persulfate, aluminum potassium sulfate dodecahydrate, calcium chloride, ammonium chloride, ethyl formate, etc, and our subsidiaries also produce hardware and knitwear, etc. With a wide rang, excellent quality, competitive prices, our products enjoy great popularity at home and abroad. We trust that our experience in foreign trade and intimate knowledge of international market condition will entitle us to your confidence. Welcome new and old customers from all walks of life to contact us for future business relationships and achieving mutual success.