Цитрат пирофосфата железа

Description

Ferrous pyrophosphate citrate (soluble ferrous pyrophosphate, SFP) is a mixed iron(III) pyrophosphate and citrate complex, a soluble form of iron designed specifically for food fortification. Unlike simple iron pyrophosphate, the citrate complex converts iron into a soluble, easily digestible form without a pronounced metallic taste or noticeable change in the color of the product.

Synonyms

1,2,3-Propanetricarboxylic acid, 2-hydroxy-, sodium salt of iron (3+), mixed with iron diphosphate (3+); soluble iron pyrophosphate; Tripheric; SFP; H 61 (soluble iron pyrophosphate).

Basic Attributes

• CAS No.: 1332-96-3
• Chemical formula: C6H8O7, 2Fe, xH4O7P2, Na
• Molecular Weight: 745.21
• Exact weight: 498.819
• EU number: 233-190-0
• PSA: 278.13
• XLogP3: 2.8136

Physico-chemical characteristics

• Appearance: Soluble crystals
• Boiling point: 309.6 °C at 760 mm Hg. Art.
• Flash point: 155.2 °C

Scope of application

It is used in the food industry, the production of salt, healthy food products and medicine as an iron fortifier - primarily for the fortification of flour and cereals. The complex with citrate and pyrophosphate was described back in the mid-19th century and remains a class of food forms of iron with more than a century of history of use in oral preparations and fortification of products.

The key advantage over simple iron salts is solubility and high bioavailability while maintaining low reactivity with other components of the product, which prevents changes in the color, taste and smell of the enriched product.

Safety Information

• wgk Germany: 3

Storage

Store in a dry place, in a tightly closed container, away from strong oxidizing and reducing agents. The safety profile of the substance is favorable - low toxicity, which is consistent with its widespread use in the food industry and medicine.

Place among dietary forms of iron

The classic problem of fortifying foods with iron is the conflict between bioavailability and organoleptics: soluble salts are well absorbed, but catalyze fat oxidation and change the color and taste of the product, while insoluble forms are organoleptically neutral, but are less digestible. The iron citrate-pyrophosphate complex occupies an intermediate niche - it is soluble and bioavailable, but due to the coordination of citrate and pyrophosphate, it is less reactive with the rest of the food matrix than simple salts like ferric sulfate or ferric chloride.

History of application

Complexes of this type have been known since the mid-19th century and represent one of the first classes of dietary forms of iron, used both in oral preparations and in fortification programs for flour and grain products for more than a hundred years.

Delivery form

Supplied as soluble crystals, dosed according to the elemental iron content into liquid and dry fortification products according to the fortification recipe for a specific food matrix, be it flour, cereal, salt or drink.