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CFR

173.220—1,3-Butylene glycol.

1,3-Butylene glycol (1,3-butanediol) may be safely used in food in accordance with the following prescribed conditions:
(a) The substance meets the following specifications:
(1) 1,3-Butylene glycol content: Not less than 99 percent.
(2) Specific gravity at 20/20 °C: 1.004 to 1.006.
(3) Distillation range: 200°-215 °C.
(b) It is used in the minimum amount required to perform its intended effect.
(c) It is used as a solvent for natural and synthetic flavoring substances except where standards of identity issued under section 401 of the act preclude such use.
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