Benzotriazoles such as 1,2,3-Benzotriazole are petrochemical derived ingredients which have many functions but are often added to dishwasher detergents to prevent corrosion or rust which occurs from the addition of oxygen-based bleaches in the moist environmentii. 1,2,3 -Benzotriazole can cause eye irritation, is harmful if swallowedvi and has been classified by the Dutch Expert Committee on Occupational Standards as a suspected human carcinogenvii. Benzotriazoles are also chemicals which have low biodegradabilityvi, a cause for concern considering they are often not removed during wastewater treatment and are also toxic to aquatic organismsvi. Benzotriazoles are essentially an additive to dishwasher detergents.
ii) Benzotriazole and Tolyltriazole as Aquatic Contaminants. 1. Input and Occurrence in Rivers and Lakes
vi) Benzotriazole MSDS Lanxess
vii) 1,2,3-Benzotriazole Dutch committee