You are purchasing 500 grams of Ultra Pure (99.9 minimum%) Sodium Chloride crystals . Perfect for use in the Lab or R&D purposes. Buyer assumes all liability for the use of this item. Buyer agrees to not hold the seller or Amazon liable 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 or drug use. Shipping will comply with all USPS regulations. Material is non hazardous and non regulated.