Profile: Yunnan Tianyao Chemical Co., Ltd. develops and manufactures fine phosphor chemical products. Our products include phosphor series flame retardants, special phosphoric acid, organic phosphor chemical products and yellow phosphor. Our ammonium polyphosphate abbreviatin is a high-grade inflated fireproof material. It is widely used in the flame retarding processing of plastic, polyaminoester foam, rubber and fiber materials. It is also used to make dry powder to extinguish fire in large areas of forest and coalfield.