Ingredient · E519

Copper sulphate

Source
Not animal-derived
Allergen
No
Role in food
Copper sulphate is primarily used as a nutrient in dietary supplements and fortified foods, …

What is Copper sulphate?

Copper sulphate is an inorganic salt that appears as blue crystals. It is produced industrially by reacting copper metal or copper oxides with sulfuric acid. It is not typically found in food as a naturally occurring substance.

Is Copper sulphate vegan?

Copper sulphate is not animal-derived. Products that contain it can still include other animal-derived ingredients, so check the full ingredient list.

Is Copper sulphate gluten-free?

It does not contain gluten.

Is Copper sulphate a major allergen?

Copper sulphate is not one of the 14 major allergens that UK law requires to be emphasised on food labels.

What is Copper sulphate used for?

Copper sulphate is primarily used as a nutrient in dietary supplements and fortified foods, such as meal replacements and infant formulas, to ensure adequate copper intake.

Is Copper sulphate safe?

Copper sulphate is authorised as a food additive in the UK and is listed on the Register of Food Additive Authorisations.

Why it's used

Copper sulphate is primarily used as a nutrient in dietary supplements and fortified foods, such as meal replacements and infant formulas, to ensure adequate copper intake. It can also be used as a fungicide and algaecide in agriculture, but its use in food is restricted to specific nutritional purposes.

Health notes

Copper sulphate is authorised as a food additive in the UK and is listed on the Register of Food Additive Authorisations. It is an essential trace element for human health, playing a role in various bodily functions. EFSA has evaluated copper sulphate and it is permitted for use as a nutrient. High intakes of copper can lead to adverse health effects, but typical dietary intakes from fortified foods are generally considered safe.

Allergen info

Copper sulphate is not one of the 14 major allergens that UK law requires to be emphasised on food labels. It does not contain gluten.

Foods that contain Copper sulphate

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Auto-generated content. This description was generated automatically and is pending editorial review. Inaccuracies are possible. Found a mistake? Contact us.

Last updated: 17 October 2026

Note: This site presents label data from Open Food Facts for general information. It is not medical advice. Check the package label; formulations change.