Clearly Clean Toilet Bowl Cleaner removes rust stains and mineral deposits, and when used consistently produces amazing results on stains you thought were permanent (provided that the original porcelain surface has not been damaged)! *Employs natural cleaning agents manufactured from renewable resources. *Contains no phosphates, petroleum solvents, chlorine, perfumes, dyes, or animal by-products. *Safe for use in closed environments and does not compromise indoor air quality. *We do NOT test our products on animals. *This vegetable-based product breaks down safely and rapidly in the environment.