Citric Acid is a natural, weak organic acid that is found in many fruits and vegetables, especially citrus. Citric Acid has a sour flavour, preservative quality, and ability to act as a pH buffer. For these reasons, Citric Acid is found on the ingredient list of many food products today. It is the most widely used organic acidulate across all industries. Citric Acid is a key ingredient for making Bath Bombs. We recommend using 2 Parts Sodium Bicarbonate to 1 Part Citric Acid. It can also be used for descaling different household items such as kettles and shower heads and it can also be used as a water softener.