MemBrite™ Fix Cell Surface Staining Kits are designed for covalently staining the surface of live cells to conveniently visualize cell boundaries in immunofluorescence experiments. MemBrite™ Fix are new covalent cell surface stains that react irreversibly with cell surface proteins for staining that can withstand formaldehyde or alcohol fixation, and detergent permeabilization. MemBrite™ Fix staining is rapid and non-toxic to cells, and because the dyes are highly water soluble, they stain cells much more evenly than traditional lipophilic membrane dyes like DiO, DiI, PKH, Vybrant, or CellMask™. MemBrite™ Fix-ST 681/698 is recommended for super-resolution imaging by STORM. This trial size kit has reagents sufficient for 100 labeling reactions. The kit contains 1 vial of MemBrite™ Fix-ST 681/698 that is sufficient for 20 uL of 1000X dye after DMSO reconstitution.