VectaMount™ Mounting Medium (H-5000) is an optically clear and odorless formula for permanently preserving histochemical stains or precipitable enzyme substrates in tissue sections or cell preparations. VectaMount™ contains no toluene or xylene, and has a viscosity which provides for easy application and uniform spreading over the tissue section. Mounted sections are clear with an ideal refractive index suitable for high resolution oil immersion microscopy. It preserves the color and intensity of preparations stained with enzyme substrates such as DAB, TMB, and BCIP/NBT, Vector® NovaRED™ , Vector® VIP, Vector® SG, ImmPACT™ DAB, ImmPACT™ DAB EqV, ImmPACT™ NovaRED™ , ImmPACT™ VIP, ImmPACT™ SG, Vector® Red, ImmPACT™ Vector® Red, Vector® Blue, and Vector® Black. The crystal formation that frequently occurs with the alkaline phosphatase substrate BCIP/NBT using other permanent mounting media is essentially eliminated.