Cosmetic Raw Materials 1. What is Azelaic acid powder? Azelaic acid is a classic medicinal ingredient. Whenever an ingredient is associated with a drug or disease treatment, there is a lot of literature evidence. Like retinoic acid, like niacin (vitamin B3), like vitamin C. But azelaic acid is a niche player in the skincare industry. In fact, it is a safe, effective and good medicine for acne...