This product is a low molecular weight polyelectrolyte, the general relative molecular weight of 400-800, non-toxic, soluble in water, chemical stability and high thermal stability, decomposed temperature above 330 degrees Celsius. At high temperature and high PH value significantly under the limit of the melting effect. Applicable to basic water or mixed with other drug use. 300 degrees Celsius below the carbonate has good scale inhibition and dispersion effects, the products can also be used to cement admixtures. This product is the flash device in the desalination of sea water and low pressure boilers, heating systems, steam, crude oil dehydration, water pipeline and industrial circulating cooling water to be widely used.