How about tertiary butylhydroquinone (TBHQ), a chemical preservative so deadly that just five grams can kill you?
These are just two of the ingredients in a McDonalds Chicken
McNugget. Only 50 percent of a McNugget is actually chicken. The other
50 percent includes corn derivatives, sugars, leavening agents and
completely synthetic ingredients.
Organic Authority helpfully transcribed the full ingredients list provided by McDonalds:
"White boneless chicken, water, food starch-modified, salt,
seasoning (autolyzed yeast extract, salt, wheat starch, natural
flavoring (botanical source), safflower oil, dextrose, citric acid,
rosemary), sodium phosphates, seasoning (canola oil, mono- and
diglycerides, extractives of rosemary).
Battered and breaded with: water, enriched flour (bleached wheat
flour, niacin, reduced iron, thiamin mononitrate, riboflavin, folic
acid), yellow corn flour, food starch-modified, salt, leavening (baking
soda, sodium acid pyrophosphate, sodium aluminum phosphate, monocalcium
phosphate, calcium lactate), spices, wheat starch, whey, corn starch.
Prepared in vegetable oil (Canola oil, corn oil, soybean oil,
hydrogenated soybean oil with TBHQ and citric acid added to preserve
freshness). Dimethylpolysiloxane added as an antifoaming agent."
Sources:

Organic Authority
posted at>>>Dr Mercola's
https://articles.mercola.com/sites/articles/archive/2010/11/08/do-you-have-any-idea-of-the-chemicals-used-in-fast-food-chicken.aspx