410 ILCS 1/5

(410 ILCS 1/5) Sec. 5. Addition of bittering agent required. Any engine coolant or antifreeze that is manufactured after January 1, 2011, and subsequently sold within the State, and that contains more than 10% ethylene glycol, shall include denatonium benzoate at a minimum of 30 parts per million and a maximum of 50 parts per million as a bittering agent within the product so as to render it unpalatable. (Source: P.A. 96-1218, eff. 7-1-11.)