Most conventional toilet bowl cleaners are made from strong acids or caustics that can cause serious burns to your skin. Seventh generation toilet bowl cleaner will clean as well as products containing these harsh chemicals without the risk of skin burns or damage to the environment. Our toilet bowl cleaner is non-toxic, biodegradable, safe for septic systems and contains no chlorine, petroleum based cleaners, harsh chemicals or phosphates and is scented with natural emerald cypress and fir fragrance.