21 C.F.R. § 182.1711 Silica aerogel.
Title 21 - Food and Drugs
(a) Product. Silica aerogel as a finely powdered microcellular silica foam having a minimum silica content of 89.5 percent. (b) [Reserved] (c) Limitations, restrictions, or explanation. This substance is generally recognized as safe when used as a component of an anti-foaming agent in accordance with good manufacturing practice.
Title 21: Food and Drugs
PART 182—SUBSTANCES GENERALLY RECOGNIZED AS SAFE
Subpart B—Multiple Purpose GRAS Food Substances
§ 182.1711 Silica aerogel.