Chromium Potassium Sulfate

we offer our clients an exclusive range of crystal chrome alum.other details:we provide pure grade chrome alum. specifications:appearancedark violet, fine crystalsassay99% mininsolubles0.1% maxchloride (cl)0.025% maxaluminum (al)0.3% maxiron (fe)0.05% max   appearancedark purple needles or greyish-brown powder when anhydrous density1.83 g cm−3 melting point89 °c (192 °f; 362 k) boiling point400 °c (752 °f; 673 k) .