This is food-grade, USP anhydrous citric acid, used for bath bombs, bath fizzies, lotions, etc. It is added to bath bombs, bath milks, soaks, salts etc. to produce a fizzing sensation in the bathtub, releasing fragrance and oils. It can be used in lotions to change the PH of your product. Vitamin C, derived from citrus fruit. It is used commonly in hair and skincare products and many post-perm ingredients to neutralize odor. Has astringent and antioxidant properties and also can be used as a stabilizer and preservative.