Di-4-ANEPPS is a potentiometric fluorescent dye that can be used to measure membrane potential. It displays absorption/emission maxima of 495/705 nm, respectively. The relative fluorescence changes proportionally to membrane potential at a rate of approximately 10% per 100 mV. Di-4-ANEPPS has been used to measure membrane potential in a variety of tissue and cell types as well as artificial membranes.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.