High acid bowl cleaner is a powerful liquid toilet bowl cleaner, disinfectant, and deodorizer for use in restrooms with heavy traffic, hardwater, or problem soils. High acid dissolves even the toughest built-up lime deposits, hard water scale, and rust stains. Will not harm septic tanks-contains a metal corrosion inhibitor. New angle neck bottle for easier application. Hospital type disinfectant. EPA Reg. No. 675-1.