You are purchasing 100 grams of High Purity, reagent ACS, Tannic acid powder. Certified ACS by a large US supplier. This is a yellow/dark yellow powder and NOT the BROWN cheaper material from China of less purity. If it is Brown it is NOT ACS purity. The Tannin Content is 96% minimum. Your sample will come from a new 50 kg drum. For lab and research use only. NOT for food or drug use. May be harmful if swallowed. By purchasing this item the buyer agrees that they understand the uses and potential hazards with this material. Picture may not reflect new GHS labeling.