SJZ Chenghui Chemical Co., Ltd. is located in Shijiazhuang, the capital of Hebei Province, 270km away from the south of Beijing. We mainly export chemical items, four parts consisting of our business.The main business is Sulfanilic acid. we have been mainly engaging in manufacturering and sale in Sulfanilic acid for a more than 20 years, we are the earliest and largest producer in China, our present producing capacity is 10,000mts per year, 70% of our quantity for exporting, and have been ...