Trisodium citrate
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Description
The food additive E331iii, scientifically known as trisodium citrate, is a sodium salt derived from citric acid (E330). It usually appears as white crystals or granular powder and is extremely soluble in water. Although citric acid occurs naturally in citrus fruits, industrial trisodium citrate is mainly obtained by fermentation of carbohydrates (such as corn sugar or beet) using cultures of the fungus Aspergillus niger, followed by neutralization with a high-purity sodium source.
Its technological function is multifaceted, acting primarily as an acidity regulator, sequestrant, and emulsifier. By regulating the pH of foods, it not only improves flavor but also prevents oxidation and helps preserve the original texture of processed products. It is a fundamental component in the industry because it acts synergistically with other antioxidants, enhancing their effectiveness without altering the organoleptic properties of the food.
The safety of E331iii has been widely validated by major international authorities. The European Food Safety Authority (EFSA) and the JECFA Committee (FAO/WHO) have evaluated it repeatedly, concluding that it is not necessary to establish a specific Acceptable Daily Intake (ADI). This is because citrates are normal intermediates of human metabolism (Krebs cycle) and the body processes and eliminates them with complete efficiency. In the European Union, its use is authorized under the quantum satis principle, meaning it is allowed in the minimum amount necessary to achieve the desired technological effect.
Trisodium citrate is one of the most versatile and widely used additives in the food chain due to its ability to stabilize emulsions and control acidity in aqueous media. In the soft drink and carbonated beverage industry, it is used to balance the acidic taste and act as a buffering agent, ensuring that the pH level remains constant throughout the product's shelf life.
In the dairy sector, its role is critical: it is used in the production of processed cheeses, evaporated milks, and creams to prevent proteins from coagulating and to facilitate a smooth and uniform melt when heating the product. It is also a key ingredient in the production of jellies, jams, and sweets, where it helps control gelation and improves the consistency of pectins.
In the Spanish market, E331iii is a common component in a huge variety of products found in supermarkets such as Mercadona, Carrefour, or Lidl. It is frequently seen on the labels of isotonic sports drinks, where in addition to regulating flavor, it provides a small amount of sodium necessary for rehydration. It is also ubiquitous in processed meat products, such as sausages and cold cuts from both private labels and market leaders, where it helps retain moisture and improves the juiciness of the meat.
According to EC Regulation 1333/2008, its use is permitted in almost all categories of processed foods. In the United States, the FDA recognizes it under the status of Generally Recognized as Safe (GRAS), allowing its extensive use in the global industry without severe dosage restrictions.
From a toxicological point of view, E331iii is considered one of the safest and best-tolerated additives by the human body. Being a salt of an organic acid naturally present in our cells, metabolism recognizes it and uses it for energy production or excretes it renally without causing oxidative stress or cell damage. Scientific studies conducted by EFSA have shown no evidence of genotoxic, carcinogenic, or reproductive toxicity effects.
Although safe for the vast majority of the population, consumption of extremely high doses in supplements or highly concentrated foods could, in very exceptional cases, cause slight laxation or minor gastrointestinal discomfort due to its osmotic nature, although this is practically impossible to achieve through a normal diet.
No specific risk populations or allergies associated with this compound have been identified. Since it contains sodium, people following strict blood pressure control diets should be aware of its presence, although the total sodium contribution from citrates is usually minimal compared to common salt.
In conclusion, E331iii is an additive with a negligible risk profile that meets all international food safety standards.
- Sodium citrate
- Trisodium citrate
- Citric acid trisodium salt
Products in our Spanish database containing this additive
Examples found in ComerClaro Spanish product database
Product names and supermarket data may appear in Spanish.
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