Granular Pharmaceutical Grade Activated Charcoal - provides 1200 square meters of surface area per gram. Acid-washed granular activated carbon charcoal made from coconut shell by a high temperature activation process under stringent quality control. Acid and water soluble ash constituents have been greatly reduced by the washing process. It has a large surface area, excellent attrition resistance, large pore volume, and chemical stability. This product is NSF certified and meets or exceeds all food chemical codex, AWWA, ASTM Protocols.SPECIFICATIONS - 1scoop (1 tsp) yields 2.4gUS Standard Sieve Mesh Size: 12X30 Greater than 12 4% maximum. Less than 30 4% maximumTotal Surface Area - minimum 1200 m2/gIodine Number (mg/g) 1100 minimum (absorption capacity)Hardness number 98 minimum Mmoisture 5% maximum as packedApparent Density (g/cc) 0.51 typicalBack Washed & Drained Density (lbs/ft3) 28-28.5 typicalWater Soluble Ash Less than 0.5%pH 5-8All test methods are per ASTM protocol for granular activated charcoal. This information has been gathered from supplier data that is assumed to be accurate and reliable. Heath Natura, llc only warrants that this product will meet the above described specifications and makes no other warranties of any kind either expressed or implied including but not limited to fitness for a particular purpose or application. Buyer assumes all liability and risk that may arise from the use of this product.