§ 172.540 DL-Alanine.
DL-Alanine （a racemic mixture of D- and L-alanine; CAS Reg. No. 302–72–7） may be safely used as a flavor enhancer for sweeteners in pickling mixtures at a level not to exceed 1 percent of the pickling spice that is added to the pickling brine.
[56 FR 6968, Feb. 21, 1991]
更多关于美国 FDA 已批准的直接用于人类食品的添加剂种类法规，请点击美国FDA 21 CFR 第172部分已批准的直接用于人类食品的添加剂种类汇总