21 CFR 582.1711 - Silica aerogel.
(a)Product. Silica aerogel as a finely powdered microcellular silica foam having a minimum silica content of 89.5 percent.
(c)Limitations, restrictions, or explanation. This substance is generally recognized as safe when used as a component of antifoaming agents in accordance with good manufacturing or feeding practice.
Title 21 published on 2015-12-03.
No entries appear in the Federal Register after this date, for 21 CFR Part 582.