ferrous ammonium phosphate
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Science
ferrous ammonium phosphate

GRAS Notice No. GRN 000271
The notice informs FDA of the view of Nestlé USA, Inc. (Nestlé) that ferrous ammonium
phosphate is GRAS, through scientific procedures, for use in various food categories as a
source of dietary iron for food enrichment and fortification purposes consistent with iron
supplementation guidelines. Nestlé states their intent to use ferrous ammonium
phosphate as a direct replacement for other iron fortificants currently in use in existing
categories of fortified foods in the U.S. Nestlé intends to use ferrous ammonium
phosphate as a food ingredient in beverages and beverage bases (non-milk based meal
replacements, powdered chocolate and malt beverages, sport beverages), grain products
and pastas (fortified cereal bars, instant noodles, meal replacement bars), milk and milk
products (milk-based meal replacements, powdered milk, milk beverages) and soups and
soup mixes (bouillon cubes/powders) at levels between 11 to 18 milligrams per serving
(mg/serving).

Ferrous ammonium phosphate is identified by the Chemical Abstracts Service Registry
Number 10101-60-7. The empirical formula of ferrous ammonium phosphate is
FeNH4PO4, and the molecular weight of the anhydrous salt is 168.85. Nestlé states that
ferrous ammonium phosphate is an inorganic salt of iron (II), ammonium, and phosphate
ions that are consistent with a 1:1:1 composition containing a small amount of water of
crystallization.

Nestlé states that ferrous ammonium phosphate is prepared by reacting ammonium
hydroxide, iron powder, and phosphoric acid in demineralized water. The reaction product
is dried, milled, and then passed through a sieve and a magnetic separation unit to
remove any excess starting materials and insoluble salts.