You are purchasing 25 grams of Ultra Pure Alpha Arbutin powder that is 99% pure minimum (currently 99.8%). Some clumping may occur but that is natural. Buyer must be 21 years of age. Buyer assumes all liability for the use of this item. Buyer agrees to use this item in accordance with all local, state, and federal laws. This is for laboratory and scientific use only! Not for food , drug , or cosmetic use. Shipping will comply with all USPS regulations. Item is NOT regulated by the DOT.