Amaranth oil is a light-to-medium-colored, clear liquid that is pourable at low temperatures. Because it is a pourable liquid, it is considered more convenient than Cl to dispense. In late 1962 DuPont provided a solution, a new pourable polyurethane plastic known as Adiprene. It is plastic but not pourable, and becomes brittle with age. Starting at the square, solid red and dashed blue paths show pourable transitions.