... sepiolite powder 1.Water:4% max 2.Hardness:2-2.5 3.Good quality, prompt shipment ... Light weight:Specific Gravity:2-2.3,weight :1.2-1.5 tons / M3,hardness: 2-2.5,non-toxic, ... 1500-1700 .It can be dissolved in hydrochloric acid..♦2 . Chemical composition: CompositionAl2sub>O3 (%)Fe2O3 (%)Ca2sub>O ... Gap (%)pulp (%)Decoloration (%)Activated decoloration (%)40-450.2-2.20.3-22.5-2017-2532-4860-105m3/t10 ...