§ 173.220 - 1,3-Butylene glycol.

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1,3-Butylene glycol (1,3-butanediol) may be safely used in food in accordance with the following prescribed conditions:

The substance meets the following specifications:

1,3-Butylene glycol content: Not less than 99 percent.

Specific gravity at 20/20 °C: 1.004 to 1.006.

Distillation range: 200°-215 °C.

It is used in the minimum amount required to perform its intended effect.

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.