Why preservative in ketchup?

Preservatives in ketchup, such as sodium benzoate or potassium sorbate, are added to extend shelf life and prevent spoilage by inhibiting the growth of bacteria, yeast, and mold. These ingredients help maintain the product's flavor, color, and texture over time, ensuring that it remains safe and appealing for consumers. Additionally, preservatives allow ketchup to be stored without refrigeration until opened, making it more convenient for use in households and restaurants.