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173.70 Chloromethylated aminated styrene-divinylbenzene resin.

Home > Regulations > Secondary direct food additives permitted in food for human consumption > 173.70 Chloromethylated aminated styrene-divinylbenzene resin.



[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: 21CFR173.70]

[Page 128]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 173_SECONDARY DIRECT FOOD ADDITIVES PERMITTED IN FOOD FOR HUMAN 
CONSUMPTION--Table of Contents
 
  Subpart A_Polymer Substances and Polymer Adjuvants for Food Treatment
 
Sec.  173.70  Chloromethylated aminated styrene-divinylbenzene resin.

    Chloromethylated aminated styrene-divinylbenzene copolymer (CAS Reg. 
No. 60177-39-1) may be safely used in food in accordance with the 
following prescribed conditions:
    (a) The additive is an aqueous dispersion of styrene-divinylbenzene 
copolymers, first chloromethylated then aminated with trimethylamine, 
having an average particle size of not more than 2.0 microns.
    (b) The additive shall contain no more than 3.0 percent nonvolatile, 
soluble extractives when tested as follows: One hundred grams of the 
additive is centrifuged at 17,000 r/min for 2 hours. The resulting clear 
supernatant is removed from the compacted solids and concentrated to 
approximately 10 grams on a steam bath. The 10-gram sample is again 
centrifuged at 17,000 r/min for 2 hours to remove any residual insoluble 
material. The supernatant from the second centrifugation is then removed 
from any compacted solids and dried to constant residual weight using a 
steam bath. The percent nonvolatile solubles is obtained by dividing the 
weight of the dried residue by the weight of the solids in the original 
resin dispersion.
    (c) The additive is used as a decolorizing and clarification agent 
for treatment of refinery sugar liquors and juices at levels not to 
exceed 500 parts of additive solids per million parts of sugar solids.

[50 FR 29209, July 18, 1985]





Additives that reference this regulation:


Source: U.S. Code of Federal Regulations - CFR Title 21, Part 173, Section 70


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