Chromogen of choice for immunoperoxidase techniques. The brown reaction product is highly insoluble, and will not diffuse from the site of localization. The color does not fade, and therefore, slides can be saved as a permanent record. The reaction product also chelates with osmium tetroxide and becomes electron dense for use in electron microscopy.
By adding buffer directly to the DAB serum vial with a hypodermic syringe, contact with the solid DAB is avoided. Our DAB-4HCl is prepared to the highest purity standards. It is fully water soluble and may be used without further purification for immunocytochemistry and for endogenous oxidases and peroxidase.