---
kind: "section"
citation: "21 C.F.R. § 178.3450"
title: "21"
number: "178.3450"
heading: "Esters of stearic and palmitic acids."
url: "https://uscodex.org/cfr/21/178.3450"
---

# §178.3450. Esters of stearic and palmitic acids.


The ester stearyl palmitate or palmityl stearate or mixtures thereof may be safely used as adjuvants in food-packaging materials when used in accordance with the following prescribed conditions:

- (a) They are used or intended for use as plasticizers or lubricants in polystyrene intended for use in contact with food.
- (b) **They are added to the formulated polymer prior to extrusion.**
- (c) The quantity used shall not exceed that required to accomplish the intended technical effect.

## Notes

### Authority

Authority: 21 U.S.C. 321, 342, 348, 379e.

### Source

Source: 42 FR 14609, Mar. 15, 1977, unless otherwise noted.