Home › CFR › Title 21 › Part 344 › §344.1221 CFR §344.12 — Ear drying aid active ingredient.Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe active ingredient of the product consists of isopropyl alcohol 95 percent in an anhydrous glycerin 5 percent base.