Citric acid is a useful disinfectant against a variety of bacteria and viruses. It’s viewed as a safer alternative to conventional disinfectant and cleaning products
It's widely used as an alternative to bleach, when you want to whiten and disinfect. It is whitening, de-greasing, anti-bacterial and anti-fungal. 

As a natural cleaning ingredient, it really comes into its own in contact with bicarbonate of soda and water, where its fizzing action makes it a powerful cleaning agent. 

A key ingredient in bath bombs, Citric Acid Anhydrous reacts with bicarbonate of soda to create a fizzing effect in water. It also helps to adjust the pH of products and acts as a natural preservative.