Food grade Ferrous fumarate CAS 141-01-5

I. What is Ferrous Fumarate?

Ferrous fumarate (also known as ferrous fumarate) is an organic ferric salt formed by the combination of ferrous ions (Fe²⁺) and fumarate (fumarate). Its chemical formula is:

C4H2FeO4

From the perspective of raw material sources, ferrous fumarate is composed of two chemical components that the human body is highly dependent on. Fumaric acid is a key intermediate metabolite in the tricarboxylic acid cycle (TCA cycle, citric acid cycle) and plays a central role in mitochondrial energy metabolism. Iron is an essential trace element for the human body, the central atom of hemoglobin and myoglobin, responsible for oxygen transport and storage, and a cofactor for dozens of key enzyme systems such as cytochrome oxidase and catalase. Therefore, the molecular composition of ferrous fumarate—fumaric acid and ferrous ions—is deeply related to the most basic biochemical metabolic pathways in the human body.

Ferrous fumarate is typically a reddish-orange to reddish-brown powder or fine granules, almost odorless and tasteless, slightly soluble in cold water, and soluble in dilute acids. Compared to inorganic ferrous salts such as ferrous sulfate, ferrous fumarate has superior chemical stability—it is less prone to absorbing moisture and clumping, and less likely to be oxidized to ferric iron (ferric iron has a much lower bioavailability than ferrous iron).

Food-grade ferrous fumarate refers to products whose production, purification, quality control, packaging, and transportation comply with relevant food safety standards. It differs from pharmaceutical-grade and feed-grade ferrous fumarate, primarily in the following aspects:

1. Higher purity requirements

Food-grade products require stable main content and low impurity content, making them suitable for food fortification and everyday food processing.

2. Stricter safety standards

Food-grade ferrous fumarate requires strict control of heavy metals such as lead, arsenic, mercury, and cadmium, as well as microbial indicators. All hygiene indicators must comply with the relevant national standards for food additives or food fortifiers.

3. Production management is more standardized.

Food-grade products must be produced in an environment that complies with Good Manufacturing Practices (GMP), and packaging materials, batch traceability, and factory inspection standards must be strictly enforced.

While ordinary consumers typically don't directly purchase pure ferrous fumarate powder, it is a common and important source of iron in daily diets and nutritional supplementation. With the global promotion of flour fortification policies, the improvement of regulations on iron fortification in infant and toddler foods, and increased public awareness of iron supplementation, ferrous fumarate is entering people's daily lives in increasingly diverse ways.

II . Main Uses of Food-Grade Ferrous Fumarate

The application of food-grade ferrous fumarate revolves around its three core advantages: "highest iron content + minimal sensory interference with food matrix + good chemical stability".

1. Iron fortification of flour and cereal products – a cornerstone of global public health

In all iron applications within the food industry, flour iron fortification is the most important application of ferrous fumarate. Its core value is reflected in the following aspects:

Minimal impact on the sensory quality of food:

The biggest problem with water-soluble iron salts (such as ferrous sulfate) in flour and cereal products is their strong pro-oxidative activity—catalyzing the oxidation of unsaturated fatty acids, leading to rancidity and browning. This is particularly severe in products with high fat content, such as whole wheat flour. Ferrous fumarate, due to its low solubility in water, hardly reacts with fats and phenolic compounds in solid food matrices at room temperature, and its negative impact on product flavor, color, and shelf life is far less than that of water-soluble iron salts.

High iron content, good fortification efficiency:

In flour fortification, the amount of iron required per kilogram of flour is typically in the range of 30-60 mg. Ferrous fumarate, with an iron content of approximately 32%, requires only a small amount of raw material to achieve the target iron level. This is beneficial for both the precision of ingredient formulation and cost control in large-scale industrial production.

In this field, the applications of ferrous fumarate include:

- Fortified wheat flour and corn flour

- Fortified bread and baking products

- Fortified noodles and flour products

- Fortified cookies and pastries

- Fortified breakfast cereals and instant oatmeal

- Fortified rice cereal and rice products

2. Infant formula and complementary foods – safeguarding iron nutrition during the first 1000 days of life.

The first 1000 days of life (from conception to age 2) are a critical window for growth and cognitive development. Iron deficiency anemia during this period can lead to irreversible neurocognitive impairment. Therefore, iron fortification of infant and toddler complementary foods and formula has extremely high public health value.

Advantages of using ferrous fumarate in infant formula:

Relatively gentle on the digestive system of infants and young children:

Infants' gastrointestinal function is not fully mature, and their tolerance to food components is lower than that of adults. Ferrous fumarate has low solubility in water and gradually dissolves and is absorbed in the acidic environment of the stomach. It does not release a high concentration of free iron ions in the stomach instantly, which would irritate the gastric mucosa. Compared with water-soluble iron salts such as ferrous sulfate, it is less irritating to the gastrointestinal tract of infants.

Good mixing performance:

Infant rice cereal and formula milk powder need to be mixed with water. The low water solubility of ferrous fumarate becomes an advantage in this scenario—the iron component is stably dispersed in the product system during mixing, and will not dissolve rapidly to produce visible discoloration or perceptible odor, resulting in higher sensory acceptance of the product.

Good oxidative stability:

Infant and toddler foods have strict requirements for shelf life. Ferrous fumarate's good oxidative stability helps maintain the product's iron content and sensory quality throughout its shelf life.

The food items that may be involved include:

- Infant formula (Stage 1, Stage 2, Stage 3)

- Infant rice cereal and cereal complementary foods

- Teething biscuits and snacks for infants and toddlers

- Baby fruit puree, vegetable puree and meat puree

- Infant formula for special medical purposes

3. Dietary supplements and health foods – cost-effective daily iron supplementation options

In the dietary supplement market, ferrous fumarate has established a clear stratification with other iron sources:

- Ferrous sulfate: the cheapest, but with the most pronounced gastrointestinal side effects and a strong metallic taste.

- Ferrous fumarate: Highest iron content, good cost performance, moderate gastrointestinal side effects and sensory impact.

- Ferrous glycinate and other amino acid chelated iron: highest absorption rate, gentlest on the gastrointestinal tract, but also most expensive.

Ferrous fumarate strikes a balance between price, effectiveness, and tolerability, making it one of the most common iron sources in mass-market iron supplements. Consumers are most likely to encounter ferrous fumarate in the following products:

- Single iron supplement tablets and capsules

- Health foods that nourish blood and replenish qi

- Nutritional supplements for women during menstruation and while preparing for pregnancy

- Comprehensive nutrition for pregnancy and lactation

- Comprehensive nutritional supplements for middle-aged and elderly people

Iron supplements for athletes

4. Special Dietary Foods – Iron Fortification Programs for Targeted Populations

Ferrous fumarate has a wide range of applications in special dietary foods for people at specific physiological stages and in specific health conditions:

Pregnancy nutrition:

During pregnancy, blood volume increases by approximately 50%, and iron requirements rise from 18 mg/day in adult women to 27 mg/day, which is extremely difficult to meet with a regular diet. Adding ferrous fumarate to prenatal vitamins and pregnancy formulas is standard practice for preventing iron-deficiency anemia during pregnancy.

Sports nutrition:

Athletes have a higher iron requirement than the general population due to factors such as accelerated red blood cell turnover, minor gastrointestinal blood loss, and iron loss through sweat. Ferrous fumarate provides iron support for athletes in functional foods such as protein powder, meal replacement powder, and nutrition bars.

Weight management and meal replacement products:

Meal replacement shakes and bars need to be fortified with a comprehensive range of micronutrients, and iron is an indispensable one. Ferrous fumarate, with its high iron content and minimal impact on product flavor, has become an ideal source of iron fortification in meal replacement products.

Nutrition for middle-aged and elderly people:

In middle-aged and elderly individuals, reduced gastric acid secretion (common in atrophic gastritis) and insufficient dietary intake lead to decreased iron absorption efficiency. Ferrous fumarate can effectively dissolve and release ferrous ions in the acidic environment of the stomach, and is widely used in nutritional support products for middle-aged and elderly people.

5. Iron fortification in seasonings – continuous micro-iron supplementation in daily diet

In Southeast Asian countries such as Thailand and Vietnam, iron fortification of everyday condiments like fish sauce and soy sauce has proven to be an effective strategy for improving iron nutrition status. The value of ferrous fumarate in these applications includes:

- It exhibits good chemical stability in acidic or neutral environments.

- The impact on the color of seasonings is controllable

- Daily micronutrient intake, long-term continuous supplementation

- Does not alter the cooking properties of the seasoning

6. The comprehensive advantages of ferrous fumarate compared to other iron sources in food.

Based on the above application scenarios, the comprehensive advantages of food-grade ferrous fumarate can be summarized as follows:

Highest iron content:

With an elemental iron content of 32%~33%, it is among the best in mainstream food iron fortifiers, achieving the target iron level with minimal addition, which is beneficial for both product formulation and cost.

Minimal interference with the sensory quality of food:

Its low water solubility means that it does not produce obvious iron taste or color changes in solid and semi-solid food matrices, and does not catalyze the oxidation and rancidity of fats, making it the preferred choice for iron fortification in sensory-sensitive foods such as flour, grains, and baked goods.

Good chemical stability:

It is not easily oxidized to ferric iron during storage and processing, thus maintaining stable iron bioavailability throughout the product's shelf life.

III . Summary

Ferrous Fumarate, also known as ferrous fumarate, is an organic iron salt formed by the combination of ferrous ions and fumarate ions. It contains approximately 32% to 33% iron and is one of the varieties with the highest iron content among mainstream oral iron supplements and food iron fortifiers.

In our daily lives, we come into contact with ferrous fumarate through various channels, including fortified flour and cereal products (bread, noodles, biscuits, breakfast cereals), infant rice cereal and formula milk powder, iron supplements, prenatal nutrients, meal replacement products, and even fortified seasonings.

In the food-grade sector, the core value of ferrous fumarate revolves around three main characteristics: "highest iron content + minimal sensory interference with food matrix + good chemical stability." It focuses on five key areas: iron fortification of flour and cereals, infant formula, dietary supplements, special dietary foods, and iron fortification of seasonings.