The chemical name for BHT is Butylated Hydroxtoluene and the chemical formula for it is C15 - H24 - O. Below are two images of BHT on the left side of the page is the simplified version of it and on the right side is the one that shows everything on it.
Picture_1.png bht.gif


IMAGE CITATIONS
http://en.wikipedia.org/wiki/Image:2%2C6-bis%281%2C1-dimethylethyl%29-4-methylphenol.svg | http://chemistry.about.com/library/weekly/aa082101a.htm
Link to image above _Link to other image above

"Butylated hydroxyanisole (BHA) and the related compound butylated hydroxytoluene (BHT) are phenolic compounds that are often added to foods to preserve fats."
Characteristics of BHT
  • Also known as 3,5-di-tert-butyl-4-hydroxytoluene; methyl-di-tert-butylphenol; 2,6-di-tert-butyl-para-cresol
  • Molecular formula C15H24O
  • White powder
Foods that contain BHT
BHA is generally used to keep fats from becoming rancid. It is also used as a yeast de-foaming agent. BHA is found in butter, meats, cereals, chewing gum, baked goods, snack foods, dehydrated potatoes, and beer. It is also found in animal feed, food packaging, cosmetics, rubber products, and petroleum products.
BHT also prevents oxidative rancidity of fats. It is used to preserve food odor, color, and flavor. Many packaging materials incorporate BHT. It is also added directly to shortening, cereals, and other foods containing fats and oils.

Info from http://chemistry.about.com/library/weekly/aa082101a.htm