Sodium lignosulfonate is a natural polymer derived from lignin, which is a complex organic compound found in the cell walls of many plants. It is a water-soluble powder that is typically brown in color and has a characteristic odor.Sodium lignosulfonate is commonly used as a dispersant, binder, and emulsifier in a variety of industrial applications, including the production of concrete, ceramics, and animal feed. In the construction industry, it is often used as a water-reducing agent in concrete mixtures to improve workability and reduce the amount of water needed for the mixture.
The "China Bag Packing" specification likely indicates that the sodium lignosulfonate is packaged in bags for export from China. This is a common practice for many industrial chemicals and materials that are produced in China and exported to other countries.