21 CFR § 184.1521 - Monosodium phosphate derivatives of mono- and diglycerides.

---
identifier: "/us/cfr/t21/s184.1521"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 184.1521 - Monosodium phosphate derivatives of mono- and diglycerides."
title_number: 21
title_name: "Food and Drugs"
section_number: "184.1521"
section_name: "Monosodium phosphate derivatives of mono- and diglycerides."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "B"
subchapter_name: "FOOD FOR HUMAN CONSUMPTION"
part_number: "184"
part_name: "DIRECT FOOD SUBSTANCES AFFIRMED AS GENERALLY RECOGNIZED AS SAFE"
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, 342, 348, 371."
regulatory_source: "42 FR 14653, Mar 15, 1977, unless otherwise noted."
cfr_part: "184"
---


# 184.1521 Monosodium phosphate derivatives of mono- and diglycerides.

(a) Monosodium phosphate derivatives of mono- and diglycerides are composed of glyceride derivatives formed by reacting mono- and diglycerides that are derived from edible sources with phosphorus pentoxide (tetraphosphorus decoxide) followed by neutralization with sodium carbonate.

(b) The ingredient must be of a purity suitable for its intended use.

(c) In accordance with § 184.1(b)(1), the ingredient is used in food with no limitation other than current good manufacturing practice. The affirmation of this ingredient as generally recognized as safe (GRAS) as a direct human food ingredient is based upon the following current good manufacturing practice conditions of use:

(1) The ingredient is used in food as an emulsifier and emulsifier salt as defined in § 170.3(o)(8) of this chapter, a lubricant and release agent as defined in § 170.3(o)(18) of this chapter, and as a surface-active agent as defined in § 170.3(o)(29) of this chapter.

(2) The ingredient is used in the following foods at levels not to exceed current good manufacturing practice: dairy product analogs as defined in § 170.3(n)(10) of this chapter and soft candy as defined in § 170.3(n)(38) of this chapter.

(d) Prior sanctions for this ingredient different from the uses established in this section do not exist or have been waived.

[54 FR 7404, Feb. 21, 1989, as amended at 73 FR 8607, Feb. 14, 2008]