Federal officials have also issued recent warnings about lead paint in toy trains, defective tires and toothpaste made with diethylene glycol, a toxic ingredient commonly found in antifreeze.
They consist of clusters of zinc-oxide crystals, which are easily precipitated from a solution of zinc acetate in diethylene glycol (better known as antifreeze) at the right temperature.
Pegasys takes an old hepatitis C drug, interferon, and wraps it in a protective polymer coating of polyethylene glycol (PEG for short) that prevents the interferon from being broken down quickly in the body.