The market for water treatment chemicals is very chaotic. When purchasing products, it is necessary to compare prices and pay attention to the actual application effects of the products. For anionic polyacrylamide products, the size of molecular weight is one of the main properties that distinguish their products, but another index, ‘degree of hydrolysis’, should not be overlooked. What molecular weight is used is analyzed according to the quality of the water being treated. Different molecular weight products are selected according to the water quality and use. High molecular weight polyacrylamide does not necessarily show excellent capabilities. On the contrary, low molecular weight products function Probably not too bad.