Citric acid

Anhydrous Citric Acid Citric acid in anhydrous form is a pH regulator added to water-based cosmetic formulations when the finished blend needs to be acidified to a value suitable for skin. Its second major application is in bath bombs and effervescent salts, where it creates a fizzing reaction together with sodium bicarbonate. It is supplied in cosmetic and food-grade quality , making it suitable for household cleaning products and kitchen use as well. What it is used for pH adjustment – the most common reason it is added. Tonics, shampoos, shower gels and emulsions often end up with a higher pH than desired after the ingredients are mixed. A small amount of dissolved citric acid pulls it into a more acidic range; the recommended range is pH 3 – 6 depending on the product type. Chelating agent – binds metal ions present in water and raw materials. This helps maintain the colour and fragrance stability of the formulation and supports the effectiveness of the preservation system. Exfoliation – at low concentrations it promotes gentle shedding of dead skin cells and a fresher complexion. When used for this purpose, the final pH and dosage need to be monitored. Antioxidation – helps protect the formulation against oxidation. Effervescent effect – in dry mixtures with sodium bicarbonate it is the acidic component that triggers fizzing upon contact with water. Use in formulation The powder is miscible with water , partially soluble in alcohol and insoluble in oil. For water-based formulations it is therefore dissolved in the aqueous phase, or a water-based stock solution is prepa