Smart Choice Mercaptan Assassin Enzymatic Digester is formulated with a non-pathogenic bacterial culture that organically digests uric salts, mercaptans, proteins, fats, oil & grease - effectively eliminating both stains & odors without leaving any residue behind. Mercaptan Assassin contains no harsh acids or chemicals, it is not flammable, and is safe for use on clothing. Use Mercaptan Assassin to eliminate gas ordorant from carpet, upholstery, clothing, shoes, fabrics, tile, grout, cement, and other porous surfaces. Sold in 1-Gallon containers.