Vector Blue Substrate Kit, Alkaline Phosphatase (AP), 1 Kit. The Vector Blue AP Substrate Kit produces a blue, heat-stable reaction product. This chromogen can be used singly or in combination with other alkaline phosphatase or peroxidase substrates for multiple label applications. Features: Greater sensitivity than conventional substrates, Consistent and reliable, Ideal for IHC/ICC/ISH and blots, Fluorescent, Heat stable, Permanent mounting, Stock solutions supplied in convenient dropper bottles promoting ease of handling, No wait times for mixing and dissolving powders or tablets, Sufficient reagents to produce 200 ml of working solution. Excitation: broad, peak at ~500 nm; Emission: broad, peak at ~680 nm.* (*Histochem J. (1998) 8:577)