Appearance: Yellowish - white to brownish - yellow odorless powder
Solubility: Slightly soluble in water and acetic acid, soluble in inorganic acids, ammonia water, alkaline solutions and citric acid
Iron Content: 24.0% - 26.0%
CAS Number: 10058 - 44 - 3
Preparation Methods
Ferric Nitrate Method: Ferric nitrate is added to a reactor filled with distilled water, and sodium pyrophosphate anhydrous is slowly added with stirring for reaction to form ferric pyrophosphate. Then, through steps such as impurity removal, filtration, washing and drying, the edible ferric pyrophosphate product is obtained.
Ferric Chloride Method: Sodium pyrophosphate aqueous solution is added to ferric chloride or ferric citrate aqueous solution, and the resulting precipitate is filtered and washed with water, and then dried and crushed to obtain ferric pyrophosphate.
Product Characteristics
High Safety: In 1994, the US Food and Drug Administration listed it in the GRAS (Generally Recognized As Safe) substance list. It has little gastrointestinal irritation and no adverse reactions or side effects.
Good Stability: It can withstand high temperatures, is not easily oxidized itself, will not accelerate fat oxidation, and remains unchanged during storage.
Good Absorbability: It has a high bioavailability, similar to water - soluble ferrous gluconate. Under the acidic conditions of the stomach, iron can be released quickly and in large quantities.
Main Uses
Food Additive: As an iron - fortified nutritional supplement, it is used in fortified milk powder, baby food and general food, such as flour, biscuits, bread, dry - mixed milk powder, rice flour, soy milk powder, etc. It is also used in infant formula foods, health foods, convenience foods and functional fruit juice drinks.
Other Fields: It is used to manufacture anti - corrosion pigments, catalysts, flame retardants for synthetic fibers, etc.