Drano

Drano (or Drāno) is a drain cleaner product manufactured by S. C. Johnson & Son.

Crystal Drano

According to the National Institutes of Health's Household Products Database, the crystal form is composed of sodium hydroxide (lye), sodium nitrate, sodium chloride (salt), and aluminum.

The colored crystals in Drano are for appearance only; lye is white in color. Lye decomposes most organic matter and is particularly effective on fat, grease and hair which are materials which often clog drains. As the decomposition is more rapid if the temperature of the mixture is higher, and lye reacting with aluminum produces heat, shards of aluminum are an ingredient in Drano. Several chemical reactions take place here: