[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR177.1830]
[Page 322-323]
TITLE 21--FOOD AND DRUGS
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN
SERVICES (CONTINUED)
PART 177 INDIRECT FOOD ADDITIVES: POLYMERS--Table of Contents
Subpart B Substances for Use as Basic Components of Single and Repeated
Use Food Contact Surfaces
Sec. 177.1830 Styrene-methyl methacrylate copolymers.
Styrene-methyl methacrylate copolymers identified in this section
may be safely used as components of plastic articles intended for use in
contact with food, subject to the provisions of this section.
(a) For the purpose of this section, styrene-methyl methacrylate
copolymers consist of basic copolymers produced by the copolymerization
of styrene and methyl methacrylate such that the finished basic
copolymers contain more than 50 weight percent of polymer units derived
from styrene.
(b) The finished plastic food-contact article, when extracted with
the solvent or solvents characterizing the
[[Page 323]]
type of food and under the conditions of time and temperature
characterizing the conditions of intended use as determined from tables
1 and 2 of Sec. 176.170(c) of this chapter, yields extractives not to
exceed the following when tested by the methods prescribed in Sec.
177.1010(c);
(1) Total nonvolatile extractives not to exceed 0.3 milligram per
square inch of surface tested.
(2) Potassium permanganate oxidizable distilled water and 8 and 50
percent alcohol extractives not to exceed an absorbance of 0.15.
(3) Ultraviolet-absorbing distilled water and 8 and 50 percent
alcohol extractives not to exceed an absorbance of 0.30.
(4) Ultraviolet-absorbing n-heptane extractives not to exceed an
absorbance of 0.40.
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