1.Appearance: achromatism, tramsparent  crystal or fine powder.
Two models: α (Rhombus); β (Single chamfercut crystal)

2.

PURlTY≥	99.60%
SULPHATE AS S04 ≤	0.10%
CHLORIDE AS CL ≤	20PPM
IRON ≤	0.02%
HEAVY METALS ≤	10PPM
ASH≤	0.10%
LOSS ON IGNITION≤	0. 08%