Adsorption power of methylene blue (0,15%) min.......................100 ml/g

Decolorizing power............................................................................... p/t.

MAX. IMPURITIES

Soluble matter in H2O....................................................................... 0,2 %

Soluble matter in HCl..........................................................................1 %

Soluble matter in C2H5OH................................................................. 0,2 %

Organic substances............................................................................. p/t.

Loss on drying at 120°C....................................................................10 %

Residue on ignition..............................................................................1 %

Acidity and alkalinity............................................................................. p/t.

Chloride (Cl).................................................................................... 0,01 %

Sulphate (SO4)................................................................................ 0,01 %

Sulphide (S).......................................................................................... p/t.

Ca................................................................................................... 0,05 %

Cu................................................................................................. 0,002 %

Fe.................................................................................................. 0,025 %

Ni.................................................................................................. 0,002 %

Pb................................................................................................. 0,002 %