Sodium o-phenylphenate is a Sodium salt of ophenylphenol; avail. commercially as the tetrahydrate Sodium o-phenylphenate uses and applications include: Preservative in cosmetics, foods; antimicrobial, bactericide, fungicide, mold inhibitor for apples, etc.; industrial preservative; disinfectant; antimicrobial, biocide for adhesives, gums, latexes, paper coatings, hides, leather, textile spinning, timber, metalworking fluids, ceramics, chemical toilets, construction, disinfectants, household products (cleaners, floor care), inks; preservative in food packaging adhesives, coatings for food-contact paper, in food-contact animal glues; can end cement for food contact; defoamer in food-contact paperpaperboard; in closure-sealing gaskets for food containers