Tartaric acid
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Description
E334, known as tartaric acid, is a food additive classified as an acidity regulator. It is a natural organic acid present in many fruits, especially grapes, from which it is obtained as a by-product of the wine industry. Industrially, it is produced from wine fermentation residues (tartrates) through hydrolysis and purification processes.
Tartaric acid is a white crystalline solid, odorless, with an intense sour taste. It is highly soluble in water and ethanol, and has two chiral centers, existing in isomeric forms (L-(+)-tartaric, D-(-)-tartaric, and meso-tartaric), with the L form being the most common in foods. Its main function is to regulate acidity (pH) of products, enhance sour taste, and act as a synergistic antioxidant. It is also used as a leavening agent in baking and as a stabilizer in wines.
Historically, tartaric acid was first isolated by Swedish chemist Carl Wilhelm Scheele in 1769. In the European Union, it was approved as a food additive following evaluations by EFSA (European Food Safety Authority) and WHO (World Health Organization). EFSA has established an Acceptable Daily Intake (ADI) of 30 mg/kg body weight, based on chronic toxicity studies that showed no significant adverse effects. WHO, through the Joint FAO/WHO Expert Committee on Food Additives (JECFA), has also evaluated tartaric acid and set the same ADI.
Regarding food safety, E334 is considered safe in authorized doses. No carcinogenic, mutagenic, or teratogenic effects have been documented. On product labels, it must appear as "tartaric acid" or "E334". It is important to note that, although it is a safe additive, excessive consumption may cause mild gastrointestinal discomfort in sensitive individuals.
Overall, the safety assessment is very positive, making it one of the most widely used and well-studied additives.
E334 is used in a wide variety of food categories. According to EC Regulation 1333/2008, it is authorized in products such as non-alcoholic beverages (soft drinks, juices), confectionery (candies, gummies), jams, jellies, baked goods (cookies, cakes), sauces, vinegars, wines, and ciders.
In the Spanish market, it is found in cola soft drinks (as an acidulant), wines (to stabilize color and flavor), sour candies, fruit jams, and baking mixes. Authorized limits vary by product: for example, in non-alcoholic beverages up to 500 mg/kg, in confectionery up to 5000 mg/kg, in wines up to 3000 mg/kg (as total tartaric acid).
Compared to the US FDA, tartaric acid is classified as GRAS (Generally Recognized as Safe) and is permitted in similar amounts. In Japan, it is also approved with analogous restrictions. There are no significant differences in limits between these regions.
Documented adverse effects of tartaric acid are rare and generally mild. Animal studies have shown that very high doses (above 500 mg/kg/day) can cause gastrointestinal irritation and diarrhea, but these levels are far above the ADI of 30 mg/kg.
In humans, excessive consumption (e.g., through supplements or highly acidic foods) may cause stomach discomfort, nausea, or dental erosion due to acidity, although these effects are not specific to tartaric acid but to any strong acid. No carcinogenic, mutagenic, or teratogenic effects have been reported in long-term studies. Sensitive populations include individuals with gastrointestinal disorders such as gastritis or ulcers, who may experience additional irritation. No significant drug interactions are known.
EFSA and WHO conclude that tartaric acid is safe in authorized doses, with no relevant adverse effects on public health. In summary, E334 is one of the safest additives, with a very favorable toxicological profile.
- 2,3-dihydroxybutanedioic acid
- racemic acid
- tartaric acid
- L-(+)-tartaric acid
- D-(-)-tartaric acid
- meso-tartaric acid
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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