CFR › Title 21 › Part 172 › §172.41021 CFR §172.410Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkCalcium silicate, including synthetic calcium silicate, may be safely used in food in accordance with the following prescribed conditions:(a)It is used as an anticaking agent in food in an amount not in excess of that reasonably required to produce its intended effect.(b)It will not exceed 2 percent by weight of the food, except that it may be present up to 5 percent by weight of baking powder.