Regular Bituminous Coal Based Carbon U.S. Standard Sieve Size (Mesh Size) : 4x6/4x8/4x10/5x7/6x12/8x16/8x20/8x30/ 10x30/10x40/12x40/20x50 Iodine (mg/g) Minimum : 800/850/900/950/1000/1050/1100Â CCL4/CTC (%) Minimum : 50 / 55 / 60 / 65 / 70 / 75 / 80 / 85Â Apparent Density (g/cc) : 0.35 - 0.60 Abrasion (%) Minimum : 75 / 80 / 85 / 90 Hardness (%) Minimum : 80 / 85 / 90 / 95 Ash Content (%) Maximum : 8/9/10/11/12/13/14/15/16/17/18 Moisture (%) Maximum : 2 / 3 / 4 / 5 pH 0.3 / 0.5 / 1 / 1.5 / 2 / 2.5 / 3 / 5