Copper(II) Sulfate (E519)

Type of additive
(Glossary)		Preservatives
E NumberE519
Chemical Formula
CuSO4
Also Known AsCupric sulphate
Blue vitriol
Bluestone
Bonattite
Boothite
Chalcanthite
Chalcocyanite
Copper Sulphate pentahydrate

Purpose and Function

Copper(II) sulfate is primarily used as a nutritional supplement in food applications:

  • Nutritional Supplement: It provides copper, which is essential for various bodily functions, including iron absorption and immune function.
  • Antimicrobial Agent: It may exhibit antimicrobial properties, contributing to food preservation.
  • Improves Shelf Life: By preventing microbial growth, it helps enhance the shelf life of food products.
  • Flavor Enhancer: It can enhance the overall flavor profile of food products.

Potential Risks and Side Effects

Copper(II) sulfate is generally regarded as safe for consumption in regulated amounts. However, some concerns include:

  • Gastrointestinal Issues: High concentrations may lead to gastrointestinal discomfort, including nausea or vomiting.
  • Toxicity: In excessive amounts, copper(II) sulfate can be toxic, necessitating careful regulation in food applications.
  • Contaminants: Sourcing from reputable suppliers is essential to minimize the risk of contaminants in food formulations.