You are purchasing 100 grams of Ultra Pure Tannic acid. The minimum purity is 99%. This is the purest Tannic Acid anywhere! When Tannic acid is pure it is a light beige/tan color. Some of the brown materials being sold as tannic acid are NOT Tannic acid. They are a mixture of Tannin extracts or just impure Tannic acid. Ask for a COA always to confirm tannic acid. The COA should say "Tannic Acid" and have a specific breakdown of componenets that are found with Tannic acid (Gallic Acid etc.). Highest purity for Lab, Technical, Craft or R&D purposes. Buyer agrees to use this item in accordance with all local, state, and federal laws. This is for laboratory, craft and scientific use only! Not intended for food, drug or cosmetic uses.