Acidity regulator is a food additive able to create and stabilize a certain acid environment. It helps to regulate the acidity level from alcaline to acid, and to maintain such a property. By the way, low pH value prevents microorganisms from spreading and improves bactericide properties of conserving agents.

Acidity regulators are used in various food industries, but mainly in the confectionery, conserve and soft drink production.

Citric acid (acidity regulator E330). 

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Citric acid has such functions as an acidity regulator, acidifying agent, color stabilizer, antioxidant synergist. It is well soluble in water, has soft nice sour taste and hence is used in the food industry. The citric acid is widely used for acidification in the production of alcohol (wines) and soft drinks and confectionery.