Diphosphates
Score impact
-0.10
points/product
Description
Diphosphates (E450) are a group of food additives that act as stabilizers, emulsifiers, thickeners, and water retention agents. Chemically, they are salts of diphosphoric acid (also called pyrophosphoric acid), obtained by thermal dehydration of orthophosphoric acid. Industrially, they are produced by reacting phosphoric acid with carbonates or hydroxides of sodium, potassium, calcium, or magnesium, followed by calcination at high temperatures to form the pyrophosphate bond.
Several forms exist: disodium diphosphate (E450i), trisodium diphosphate (E450ii), tetrasodium diphosphate (E450iii), dipotassium diphosphate (E450iv), tetrapotassium diphosphate (E450v), dicalcium diphosphate (E450vi), and dimagnesium diphosphate (E450vii). They are white, odorless powders, soluble in water (except calcium and magnesium salts), with variable pH depending on the salt. Their main function is to stabilize emulsions, prevent phase separation, improve texture, and retain water in meat and dairy products. They also act as sequestrants of metal ions, preventing oxidation and color deterioration.
The history of their use dates back to the early 20th century, and they were approved in the European Union as safe additives following evaluations by the European Food Safety Authority (EFSA) and the Joint FAO/WHO Expert Committee on Food Additives (JECFA). EFSA established a group Acceptable Daily Intake (ADI) of 70 mg/kg body weight per day for all phosphates (E338-E452), based on chronic toxicity studies and effects on calcium metabolism.
WHO/JECFA confirmed this ADI. Regarding food safety, diphosphates are considered safe at authorized use levels, although excessive consumption can alter the calcium-phosphorus balance. In labeling, they must appear with their name or E number, followed by the specific salt name (e.g., E450i disodium diphosphate).
Diphosphates are used in a wide variety of processed foods. In the European Union, they are authorized by Regulation EC 1333/2008 in categories such as: meat products (sausages, cooked ham, pâtés), where they act as stabilizers and water retainers; dairy products (processed cheeses, custards, ice creams) to improve texture and prevent syneresis; bakery and pastry products (sliced bread, muffins) as dough improvers; and beverages (soft drinks, flavored milks) as emulsifiers. Maximum limits vary: for example, in processed meats up to 5 g/kg (expressed as P2O5), in processed cheeses up to 20 g/kg, and in bakery products up to 2 g/kg.
In the Spanish market, they are found in brands such as El Pozo (sausages), Campofrío (cooked ham), and processed cheeses like El Caserío. Comparatively, the FDA (USA) also approves diphosphates as GRAS (Generally Recognized as Safe) with similar uses, while Japan has stricter restrictions in some infant products.
Diphosphates are generally safe at authorized doses. However, excessive and chronic consumption of phosphates in general (including diphosphates) can have adverse effects. Studies in animals and humans have shown that high intakes of inorganic phosphorus can alter calcium metabolism, leading to hyperphosphatemia, which in turn may contribute to vascular calcification and cardiovascular risk in populations with chronic kidney disease. EFSA, in its 2019 re-evaluation, concluded that there is no evidence of adverse effects in the general population at current intake levels, but noted that individuals with renal insufficiency should limit their consumption.
No significant acute side effects have been documented. Regarding drug interactions, diphosphates may interfere with the absorption of certain minerals (iron, calcium, magnesium) if consumed in large amounts, but this is not relevant at dietary levels. WHO/JECFA also concluded that the ADI is safe. There is no evidence of carcinogenicity, mutagenicity, or reproductive toxicity in animal studies.
In summary, for the healthy consumer, diphosphates are safe; individuals with kidney disease should consult their doctor.
- Pyrophosphates
- Disodium diphosphate
- Trisodium diphosphate
- Tetrasodium diphosphate
- Dipotassium diphosphate
- Tetrapotassium diphosphate
- Dicalcium diphosphate
- Dimagnesium diphosphate
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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