In biological science experiments, buffering agents are an important component that can maintain the pH of the experimental system within a relatively stable range, which is of great significance for ensuring the accuracy and reliability of the experiment. Among them, CHES-na, as a biological buffer, has attracted widespread attention from researchers due to its unique physicochemical properties and wide applications. CHES-na, chemical name 2- (N-cycloethyl-N-ethylamino) -2-methyl-1-propanesulfonic acid, is a white powder. It is easily soluble in water and exhibits good stability in aqueous solutions. Its pH value is approximately 9.3, so it can effectively maintain pH stability in most biological experiments. The main use of CHES-na is as a pH buffer in molecular biology and biochemistry experiments. For example, in DNA amplification experiments (PCR), CHES na can stabilize the pH of the reaction system, ensure the activity of DNA polymerase, and thus improve the efficiency and accuracy of PCR. In addition, CHES na can also be used for protein separation and purification, as well as in experiments such as cell culture. CHES-na has high chemical stability, and its aqueous solution can be stored for a long time at room temperature without easy deterioration. In addition, CHES-na also has good salt resistance and can maintain its buffering performance at high ion strength. These advantages make CHES-na an excellent biological buffer, especially in biological experiments that require long-term preservation or high salt conditions. However, it is worth noting that CHES-na is not a universal biological buffer and has its specific application range. For example, in some experiments involving enzymatic reactions, CHES na may affect enzyme activity. Therefore, when using CHES na, it is necessary to fully understand its physicochemical properties and potential influencing factors, and make choices based on the specific needs of the experiment. In summary, CHES na, as a biological buffer, has many excellent physicochemical properties and wide applications. It can effectively maintain the pH stability of the experimental system, improve the accuracy and reliability of the experiment. However, we also need to recognize that each buffer has its specific scope of application and limiting conditions, so it is necessary to fully understand its properties and make appropriate choices based on experimental needs when using it. With the continuous development of science and technology, CHES-na will play an important role in more biological experiments, providing more convenience and possibilities for scientific research.