subchapter_subject: "FOOD FOR HUMAN CONSUMPTION (CONTINUED)"
part_code: "173"
part_subject: "SECONDARY DIRECT FOOD ADDITIVES PERMITTED IN FOOD FOR HUMAN CONSUMPTION"
subpart_code: "D"
subpart_subject: "Specific Usage Additives"
section_number: "173.357"
section_subject: "Materials used as fixing agents in the immobilization of enzyme preparations."
cfr_reference: "21 CFR 173.357"
title_name: "Title 21"
title_subject: "Food and Drugs"
parts_covered: "Parts 170 to 199"
revised_date: "Revised as of April 1, 2019"
publication_date: "As of April 1, 2019"
contains_description: "Containing a codification of documents of general applicability and future effect"
publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"
---
Fixing agents may be safely used in the immobilization of enzyme preparations in accordance with the following conditions:
(a)The materials consist of one or more of the following:
(1)Substances generally recognized as safe in food.
(2)Substances identified in this subparagraph and subject to such limitations as are provided:
(b)The fixed enzyme preparation is washed to remove residues of the fixing materials.