The luminescent reagent acridine salt NSP-SA has a CAS of 211106-69-3 and a molecular weight of 584.66. It appears as a yellow powder with high solubility and strong stability in water. Its diluted solution exhibits purple or green fluorescence. If further diluted, it will become free acridine due to salt hydrolysis, exhibiting purple fluorescence. The acridine salt NSP-SA has a wide range of uses and can be used as a photocatalyst and in the preparation of dyes. The luminescent reagent acridine salt NSP-SA can be used in biomedical research, such as detecting markers such as proteins, nucleic acids, antigens, and antibodies. By observing the fluorescence signal in the sample using acridine salt, it is possible to determine the presence of target molecules in the sample. In addition, pyridine salt NSP-SA can also be used in fields such as photocatalysts and dye preparation. The method of using acridine salt NSP-SA is relatively simple. Firstly, the reagent needs to be mixed with fluorescent dyes to form a fluorescent labeled complex. Then, the complex is added to the sample to be tested, such as a protein or nucleic acid solution. Finally, the fluorescence signal in the sample can be observed using a fluorescence microscope. Pay attention to avoiding reagent contamination and light intensity issues during use. When using acridine salt NSP-SA, the following points should be noted: 1. Reagents should be stored in a cool and dry place, avoiding direct sunlight and high temperatures that may cause performance changes. 2. Before use, it is necessary to check the purity and expiration date of the reagent. Expired reagents can affect the test results. Once a pungent odor occurs, it should be immediately stopped from use. 3. During the operation process, attention should be paid to avoiding reagent contamination and external cross infection.