§ 172.712 1,3-Butylene glycol.
The food additive 1,3-butylene glycol （CAS Reg. No. 107–88–0） may be safely used in food in accordance with the following prescribed conditions:
（a） It is prepared by the aldol condensation of acetaldehyde followed by catalytic hydrogenation.
（b） The food additive shall conform to the identity and specifications listed in the monograph entitled “1,3-Butylene Glycol” in the Food Chemicals Codex, 4th ed. （1996）, p. 52, which is incorporated by reference in accordance with 5 U.S.C. 552（a） and 1 CFR part 51. Copies are available from the Office of Premarket Approval, Center for Food Safety and Applied Nutrition, 5100 Paint Branch Pkwy., College Park, MD 20740, or may be examined at the Center for Food Safety and Applied Nutrition's Library, Food and Drug Administration, 5100 Paint Branch Pkwy., College Park, MD 20740, or 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） It is used in the manufacture of sausage casings as a formulation aid as defined in §170.3（o）（14） of this chapter and as a processing aid as defined in §170.3（o）（24） of this chapter.
[62 FR 26228, May 13, 1997]
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