Steris Vesphene II se Phenolic Disinfectant, 1 Gallon, 4/CS - The Vesphene formula is a one-step, alkaline phenolic cleaner/disinfectant made specifically for use on hard non-porous surfaces. The Vesphene family of products are all made with the same alkaline phenolic formulation, but are processed and packaged differently for specific applications. At a use-dilution rate of 1:128, Vesphene products kill a broad spectrum of common bacteria without harming the surface. Formulated to maintain an alkaline use-dilution pH of 10.4-10.6, they are ideal for use in a disinfectant rotation program with the LpH® acidic family of products