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Monocalcium Phosphate (E 341i) - Uses & Effects

Monocalcium phosphate is a chemical compound of calcium and phosphate, widely used as a food additive (E 341i) and as a source of essential minerals in nutrition.

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Things worth knowing about "Monocalcium phosphate"

Monocalcium phosphate is a chemical compound of calcium and phosphate, widely used as a food additive (E 341i) and as a source of essential minerals in nutrition.

What is Monocalcium Phosphate?

Monocalcium phosphate (chemical formula: Ca(H₂PO₄)₂) is an inorganic compound belonging to the group of calcium phosphates. It is also known as calcium dihydrogen phosphate and is listed as E 341i in the European food additive classification. The compound is produced by reacting calcium carbonate or calcium hydroxide with phosphoric acid and appears as a white, crystalline powder.

Use in the Food Industry

In food processing, monocalcium phosphate is primarily used as a leavening agent and acidity regulator. It reacts with sodium bicarbonate (baking soda) to release carbon dioxide, which causes dough and batter to rise. Common applications include:

Baked goods such as bread, cakes, and biscuits
Baking powder mixtures
Pasta and ready-made products
Beverage powders

As a food additive, monocalcium phosphate is considered safe at the levels permitted by EU Regulation No. 1333/2008 and holds GRAS (Generally Recognized As Safe) status in the United States.

Biological Functions and Nutritional Relevance

Monocalcium phosphate provides the body with both calcium and phosphate, two essential minerals that play key roles in:

Building and maintaining bones and teeth
Muscle function and nerve signal transmission
Energy metabolism (ATP synthesis)
Regulation of the acid-base balance

According to the World Health Organization (WHO) and European Food Safety Authority (EFSA), the recommended daily intake of calcium for adults is approximately 1000 mg per day, and for phosphorus approximately 700 mg per day. Monocalcium phosphate can contribute to meeting these requirements when used as a dietary supplement.

Application as a Dietary Supplement and in Medicine

In medicine and pharmacy, monocalcium phosphate is occasionally used as an excipient in tablets and capsules, and in the treatment of calcium and phosphate deficiency. It also serves as a mineral source in clinical nutrition formulas and specialty foods.

Safety, Side Effects, and Interactions

When consumed in typical dietary amounts, monocalcium phosphate is well tolerated. However, excessive intake may lead to the following effects:

Elevated blood phosphate levels (hyperphosphatemia), particularly in individuals with kidney insufficiency
Impaired calcium absorption when phosphate intake is excessively high
Potential interactions with certain medications such as antacids or bisphosphonates

Individuals with kidney disease should consult their physician before increasing phosphate intake, as impaired kidneys may be unable to adequately excrete excess phosphate.

References

World Health Organization (WHO) and Food and Agriculture Organization (FAO): Human Vitamin and Mineral Requirements. Rome, 2004.
European Parliament and Council of the EU: Regulation (EC) No. 1333/2008 on food additives. Official Journal of the European Union, 2008.
Calvo M.S., Uribarri J.: Public health impact of dietary phosphorus excess on bone and cardiovascular health in the general population. American Journal of Clinical Nutrition, 98(1):6-15, 2013. PubMed PMID: 23719548.

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