Trisodium nitrilotriacetate

Rated by the International Agency for Research on Cancer as a possible human carcinogen. In an assessment of nitrilotriacetic acid (NTA), a related chemical that is analytically identical in solution, Health Canada concluded that the concentrations of NTA/trisodium nitrilotriacetate in drinking water are low enough that they don't constitute a danger in Canada to human health when ingested. The problem is that individually small doses add up in the environment and contribute to our overall toxic burden. In aquatic ecosystems, trisodium nitrilotriacetate can also cause heavy metals in sediment to redissolve and many of these metals are toxic to fish and other wildlife.

Found in: bathroom cleaners and possibly some laundry detergents (more common in industrial formulations).