Question: what chemicals are in drano?
Answer: Water Water. Provides a liquid base for a product.
Sodium Hypochlorite Bleach. Sodium hypochlorite is the basic ingredient in laundry bleach and mold and mildew stain removers. ... 
Sodium Hydroxide Caustic. ... 
Proprietary Surfactant Blend Cleaning Agent. ... 
Sodium Silicate Corrosion Inhibitor.