Powerful, trusted multi-use cleaner dissolves even the hardest calcium and lime buildup, rust, mineral deposits, hard water stains, soap scum, and oxidation. Non-toxic formula is certified EPAs Safer Choice for safer chemistry and is safe for use in a wide variety of applications including coffeepots, sinks, toilets, glass, siding, stucco, sprinkler systems and more! NSF Certified and is approved for use in food processing, food storage, and food service facilities.