THE MATERIAL AS RECEIVED SHALL BE FREE FLOWING POWEDER, FREE FROM VISIBLE IMPURITES. DISPERSIBILITY OF 0,7 % (wv) SAMPLE IN DISTILLED WATER: HIGHLY DESPERSIBLE MOISTURE CONTENT, ON DRY BASIS (AS RECEIVED), PERCENT BY MASS; 10 (MAXIMUM) RESIDUE CONTENT ON DRY BASIS, PERCENT BY MASS; 0.5 (MAX) INSOLUBLE MATTER, (ON DRY BASIS) IN 15 %( WW) HCL, PERCENT BY MASS;0.3 (MAX)