NSP-SA-NHS is a chemiluminescent acridinium ester that can be used for immunoassays.

Instructions
I. Solution preparation
1. Solution preparation: Dissolve NSP-SA-NHS in an appropriate solvent, such as anhydrous DMSO, DMF or methanol, to prepare a stock solution of the required concentration. The recommended concentration of the stock solution is 100 mM for subsequent dilution.
2. Working solution preparation: Dilute the mother solution into a working solution to be used according to the experimental purpose.
II. Operation steps
1. Labeling process:
1) Dissolve the molecule to be labeled in an appropriate buffer.
2) Add an appropriate amount of NSP-SA-NHS stock solution to ensure that the dye reacts fully with the target molecule.
3) Incubate at room temperature in the dark for 30 minutes to 1 hour to promote the labeling reaction.
4) After the reaction is completed, wash the labeled product with an appropriate buffer to remove unbound dye.
2. Fluorescence detection: Use a fluorescence microscope or flow cytometer for detection. The excitation wavelength of NSP-SA-NHS is about 350 nm and the emission wavelength is about 450 nm.
Notes:
1) Wear gloves during operation to avoid contact between skin or mucous membrane and reagent.
2) Avoid light exposure during incubation and storage to prevent fluorescence quenching.
3) After staining, fluorescence detection and analysis should be performed immediately.