[Code of Federal Regulations]
[Title 21, Volume 3]
[Revised as of April 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR177.1020]
[Page 240-241]
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. 177.1020 Acrylonitrile/butadiene/sty rene co-polymer.
Acrylonitrile/butadiene/styrene copolymer identified in this section
may be safely used as an article or component of articles intended for
use with
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all foods, except those containing alcohol, under conditions of use E,
F, and G described in table 2 of Sec. 176.170(c) of this chapter.
(a) Identity. For the purpose of this section, the acrylonitrile/
butadiene/styrene copolymer consists of:
(1) Eighty-four to eighty-nine parts by weight of a matrix polymer
containing 73 to 78 parts by weight of acrylonitrile and 22 to 27 parts
by weight of styrene; and
(2) Eleven to sixteen parts by weight of a grafted rubber consisting
of (i) 8 to 13 parts of butadiene/styrene elastomer containing 72 to 77
parts by weight of butadiene and 23 to 28 parts by weight of styrene and
(ii) 3 to 8 parts by weight of a graft polymer having the same
composition range as the matrix polymer.
(b) Adjuvants. The copolymer identified in paragraph (a) of this
section may contain adjuvant substances required in its production. Such
adjuvants may include substances generally recognized as safe in food,
substances used in accordance with prior sanction, substances permitted
in this part, and the following:
------------------------------------------------------------------------
Substance Limitations
------------------------------------------------------------------------
2-Mercapto- ethanol....................... The finished copolymer shall
contain not more than 100
ppm 2-mercaptoethanol
acrylonitrile adduct as
determined by a method
titled ``Analysis of
Cycopac Resin for Residual
[beta]-(2-
Hydroxyethylmercapto)
propionitrile,'' which is
incorporated by reference.
Copies are available from
the Bureau of Foods (HFS-
200), Food and Drug
Administration, 5100 Paint
Branch Pkwy., College Park,
MD 20740, or available for
inspection at the National
Archives and Records
Administration (NARA). For
information on the
availability of this
material at NARA, call 202-
741-6030, or go to: http://
www.archives.gov/federal--
register/code--of--federal--
regulations/ibr--
locations.html.
------------------------------------------------------------------------
(c) Specifications. (1) Nitrogen content of the copolymer is in the
range of 16 to 18.5 percent as determined by Micro-Kjeldahl analysis.
(2) Residual acrylonitrile monomer content of the finished copolymer
articles is not more than 11 parts per million as determined by a gas
chromatographic method titled ``Determination of Residual Acrylonitrile
and Styrene Monomers-Gas Chromatographic Internal Standard Method,''
which is incorporated by reference. Copies are available from the Center
for Food Safety and Applied Nutrition (HFS-200), Food and Drug
Administration, 5100 Paint Branch Pkwy., College Park, MD 20740, or
available for inspection at the National Archives and Records
Administration (NARA). For information on the availability of this
material at NARA, call 202-741-6030, or go to: http://www.archives.gov/
federal--register/code--of--federal--regulations/ibr--locations.html.
(d) Extractive limitations. (1) Total nonvolatile extractives not to
exceed 0.0005 milligram per square inch surface area when the finished
food contact article is exposed to distilled water, 3 percent acetic
acid, or n-heptane for 8 days at 120 [deg]F.
(2) The finished food-contact article shall yield not more than
0.0015 milligram per square inch of acrylonitrile monomer when exposed
to distilled water and 3 percent acetic acid at 150 [deg]F for 15 days
when analyzed by a polarographic method titled ``Extracted Acrylonitrile
by Differential Pulse Polarography,'' which is incorporated by
reference. Copies are available from the Center for Food Safety and
Applied Nutrition (HFS-200), Food and Drug Administration, 5100 Paint
Branch Pkwy., College Park, MD 20740, or available for inspection at the
National Archives and Records Administration (NARA). For information on
the availability of this material at NARA, call 202-741-6030, or go to:
http://www.archives.gov/federal--register/code--of--federal--
regulations/ibr--locations.html.
(e) Acrylonitrile copolymers identified in this section shall comply
with the provisions of Sec. 180.22 of this chapter.
(f) Acrylonitrile copolymers identified in this section are not
authorized to be used to fabricate beverage containers.
[42 FR 14572, Mar. 15, 1977, as amended at 42 FR 48543, Sept. 23, 1977;
47 FR 11841, Mar. 19, 1982; 54 FR 24897, June 12, 1989]
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Additives that reference this regulation: |
