|MadSci Network: Biochemistry|
Ms. Torberson, The FDA regulations concerning the use of silicon dioxide as an anticaking agent states - It is used in an amount not to exceed 2 percent by weight of the food. It can be found on the FDA website - http://www.fda.gov/ It is part of the Code of Federal Regulation 21CFR172.480. I hope this provides the information you were looking for. Al Bushway Professor of Food Science
Try the links in the MadSci Library for more information on Biochemistry.