Hexane solvent used in most Soy food extraction

...and one more from the Organic Consumers Assn.

Food Toxins 101: An Intro to Hexane

At seven cents per pound, hexane is currently the dominant extraction solvent for soy products. Whether you're eating Boca burgers, firm tofu, partially hydrogenated soybean oil, granola crumbs for texture, or Silk soy milk, hexane likely played a role in the extraction process. Hexane was formerly used as a cleaning agent for removing grease in the printing industry as well as a solvent for rubber cement, but now it's showing up in many so-called "natural" and even "made with organic" soy foods.