2-BUTOXYETHANOL
Commonly found in: window cleaners, multipurpose sprays, bathroom cleaners, degreasers.
A solvent linked to eye, skin, and lung irritation and kidney and liver damage with prolonged exposure. Commonly used in window and multipurpose cleaners, it is not always required to appear on product labels in the US, meaning most people have no idea it is in the products being used in their homes.