§ 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.
更多關(guān)于美國(guó) FDA 可直接加入食品中的輔助性食品添加劑的種類(lèi)法規(guī)，請(qǐng)點(diǎn)擊美國(guó)FDA 21 CFR 第173部分可直接加入食品中的輔助性食品添加劑種類(lèi)匯總
