UltraBrite?藍色IHC色原(HRP)產品是The UltraBrite? blue IHC chromogen (HRP) is a substrate-chromogen system designed to be used for either immunohistochemistry (IHC) or ISH when utilizing horseradish peroxidase. UltraBrite? blue IHC chromogen (HRP) produces a sharply contrasting ebony blue color that can easily be distinguished from other stains.