StacksVerified U.S. regulatory reference

21 CFR §582.1711

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Product. Silica aerogel as a finely powdered microcellular silica foam having a minimum silica content of 89.5 percent.
  2. (b)[Reserved]
  3. (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.