21 CFR § 172.540 - Dl-alanine.

---
identifier: "/us/cfr/t21/s172.540"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 172.540 - DL-Alanine."
title_number: 21
title_name: "Food and Drugs"
section_number: "172.540"
section_name: "DL-Alanine."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "FOOD FOR HUMAN CONSUMPTION"
part_number: "172"
part_name: "FOOD ADDITIVES PERMITTED FOR DIRECT ADDITION TO FOOD FOR HUMAN CONSUMPTION"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 321, 341, 342, 348, 371, 379e."
regulatory_source: "42 FR 14491, Mar. 15, 1977, unless otherwise noted."
cfr_part: "172"
---


# 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]