Does Hershey's syrup have gluten or casein?

Hershey Syrup's ingredients include High Fructose Corn Syrup,Corn Syrup,Water,Cocoa, Sugar,Contains 2% or Less of: Potassium Sorbate (a Preservative),Salt, Mono and Diglycerides, Xanthan Gum, Polysorbate 60, Vanillin, Artificial Flavoring.