Naturally occuring Citric Acid is a member of the alpha hydroxy acid (AHA) group and in skin care products it is often used as an ingredient in exfoliants and chemical peels, such as Essential's Alpha Hydroxy Liquid Bundle, but most often Citric Acid is used to adjust the pH in personal care products such as lotions, cremes, shampoos, etc.
Appearance: Fine white powder, odorless.
To reduce the pH (increase the acidity) of water based products, add Citric Acid at approximately 0.2% during the water phase or final phase. Ideally, skin care products should have a pH between 4.5 and 5.5. In an exfoliant or chemical peel Citric Acid can be added at up to 5%. Alpha hydroxy acids can irritate the skin, so exercise caution. When used at very low levels as an acidifier / processing aid, Citric Acid does not need to be listed on ingredient decks.
Ingredient Function: Typically used as a pH adjuster, mild exfoliator and antioxidant.
Recommended Usage Rate: use at >10% or at pH <3.5
Solubility: Soluble in water.
How to Store: In a cool dark area in a well sealed container.
Warnings: Pregnant or lactating people, or those with known medical conditions should consult with a physician prior to using product.