---
kind: "section"
citation: "21 C.F.R. § 344.3"
title: "21"
number: "344.3"
heading: "Definitions."
url: "https://uscodex.org/cfr/21/344.3"
---

# §344.3. Definitions.


As used in this part:

- (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.
- (b) **Earwax removal aid.** A drug used in the external ear canal that aids in the removal of excessive earwax.
- (c) **Water-clogged ears.** The retention of water in the external ear canal, thereby causing discomfort and a sensation of fullness or hearing impairment.
- (d) **Ear drying aid.** A drug used in the external ear canal to help dry water-clogged ears.

## Notes

### Amendments

[51 FR 28660, Aug. 8, 1986, as amended at 65 FR 48905, Aug. 10, 2000]

### Authority

Authority: 21 U.S.C. 321, 351, 352, 353, 355, 360, 371.

### Source

Source: 51 FR 28660, Aug. 8, 1986, unless otherwise noted.

### Amendments

[51 FR 28660, Aug. 8, 1986, as amended at 65 FR 48905, Aug. 10, 2000]