Lysol Hydrogen Peroxide Toilet Bowl Cleaner uses hydrogen peroxide to dissolve even the toughest toilet stains. This powerful new cleaning formula uses hydrogen peroxide to release thousands of micro-bubbles that dissolve tough toilet stains. This lime scale remover even cuts through lime scale, without the harshness of bleach. Lysol Hydrogen Peroxide leaves behind no chemical residues: just a clean, fresh, scent. The thick formula clings to the bowl, brightening your toilet as it cleans and disinfects. The angled bottle targets hard-to-reach areas, including under the rim, leaving your entire toilet bowl sparkling clean, deodorized, and disinfected. Ingredients: Other Ingredients: 98.80%, Total: 100.00% Directions: To clean and disinfect/sanitize: Flush toilet before cleaning. Apply 4 oz. to coat the bowl including under the rim. Do not close lid. To disinfect: Let stand for at least 10 minutes; do not close toilet bowl lid. Brush entire bowl to wet surfaces thoroughly, including under the rim, and flush. Rinse brush in fresh water after use. Repeat if necessary. To sanitize: Let sit for 30 minutes, then flush. Rinse brush in fresh water after use. Repeat if needed. Warnings: For external use only. No known significant effects or critical hazards. Read label before use. Keep out of reach of children. If swallowed, get medical help or contact a Poison Control Center right away and have product container or label at hand. When using this product: avoid contact with eyes; in case of eye contact, flush with water. Stop use and ask a doctor if: irritation or redness develops.