Mild Bowl And Porcelain Cleaner is an effective, viscous, mild phosphoric, acid-based cleaner formulated to cling to vertical surfaces for efficient cleaning action. It is designed to clean and disinfect toilets, tubs, tile, porcelain, grout, fiberglass, and many other surfaces. Its special mild formula is nontoxic and non-caustic. Active Ingredients: Phosphoric Acid 20.00%, n-Alkyl (C14 60%, C16 30%, C12 5%, C18 5%) dimethyl benzyl ammonium chlorides 0.05%, n-Alkyl (C12 68%, C14 32%) dimethyl ethyl benzyl ammonium chlorides 0.05%. Other Ingredients: 79.90%.