Toilet Bowl Cleaner-Eco friendly, No Acidic Fumes. The advanced formulation used forms an anti-stain film over the toilet bowl and protects further formation of yellow scale formation, stubborn stains and soil depositions up to 100 Flushes*. Green Chemistry: Green Acid formulation used enables easy cleaning without hard scrubbing. It eliminates limescale and longer protection against water and stains with non-toxic biodegradable ingredients. Biodegradable: earth friendly human safe ingredients used to make up the cleaning. Eco-friendly: Free of Nitrogen, Phosphorous, Halogens. Pleasant Fragrance: No harsh suffocating fumes during cleaning activity.