Is citric acid used in packaging soy sauce?

Citric acid is not typically used in the packaging of soy sauce, but it may be included in some soy sauce formulations as a preservative or flavor enhancer. Packaging materials for soy sauce are usually made from glass, plastic, or cartons that are designed to keep the product fresh and prevent contamination. The primary focus in packaging is to maintain the quality and flavor of the soy sauce rather than the inclusion of citric acid itself.