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173.40 Molecular sieve resins.

Home > Regulations > Secondary direct food additives permitted in food for human consumption > 173.40 Molecular sieve resins.



[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: 21CFR173.40]

[Page 125-126]
 
                        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.  173.40  Molecular sieve resins.

    Molecular sieve resins may be safely used in the processing of food 
under the following prescribed conditions:
    (a) The molecular sieve resins consist of purified dextran having an 
average molecular weight of 40,000, cross-linked with epichlorohydrin in 
a ratio of 1 part of dextran to 10 parts of

[[Page 126]]

epichlorohydrin, to give a stable three dimensional structure. The 
resins have a pore size of 2.0 to 3.0 milliliters per gram of dry resin 
(expressed in terms of water regain), and a particle size of 10 to 300 
microns.
    (b) The molecular sieve resins are thoroughly washed with potable 
water prior to their first use in contact with food.
    (c) Molecular sieve resins are used as the gel filtration media in 
the final purification of partially delactosed whey. The gel bed shall 
be maintained in a sanitary manner in accordance with good manufacturing 
practice so as to prevent microbial build-up on the bed and adulteration 
of the product.





Additives that reference this regulation:


Source: U.S. Code of Federal Regulations - CFR Title 21, Part 173, Section 40


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