I have a quantity of DuPont DDA40 a web search of DuPont site gave no reference to the product.Oil industry contacts suggest it is an anti foaming agent for diesel fuel another suggested it is a surfactant for making kerosene into an oil in water emulsion degrease fluid.One of the products I make in my lube blending facility is such a fluid with kerosene and other nonionic surfactants.I need some data prior to lab tests. Product label on drum shows manufacturing date as 1991.Deduction suggests C12,dodecyl something.Accurate data would be appreciated.