GB/T 19421-2008

This standard specifies the test methods for crystalline layered sodium disilicate, a builder used in detergent formulations to enhance cleaning performance by softening water and preventing soil redeposition. It is applied in the chemical industry for quality control during the production and procurement of phosphate-free laundry detergents and cleaning agents. The testing methods cover properties such as calcium ion exchange capacity, pH, and particle size distribution to ensure consistent product performance.