Citric acid is kitchen essential. It is used as a preservative as well as to add an acidic sour taste to soft drinks, fruit squashes, jam, sauces, jellies. It is a commonly used ingredient for cheese making. It can also be used as an environmental friendly cleansing agent for removing soap scum, hard water stains, lime, rust and acts as an antioxidant. Store in an air tight container and a cool dry place.