StacksVerified U.S. regulatory reference

21 CFR §344.3

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
As used in this part:
  1. (a)Anhydrous glycerin. An ingredient that may be prepared by heating glycerin U.S.P. at 150 °C for 2 hours to drive off the moisture content.
  2. (b)Earwax removal aid. A drug used in the external ear canal that aids in the removal of excessive earwax.
  3. (c)Water-clogged ears. The retention of water in the external ear canal, thereby causing discomfort and a sensation of fullness or hearing impairment.
  4. (d)Ear drying aid. A drug used in the external ear canal to help dry water-clogged ears.