Nanjing Hengsiman Chemical Co.,LTD is the largest professional manufacturers in China.Which is collection production and sales integrates &trade enterprise. Factory is located in China's important basic chemical raw materials production base in shandong province. In the past twenty years of operation and development process, portfolio is expanding constantly, products exported to Europe and America, Southeast Asia and the Middle East. Our company is specialized in chemical raw materials export business. The major products are: acid, alkali classes, salts and pigment and so on.