As the representative of the biggest manufacturer of Indigo in China,we can sell our Indigo in granular form with Fe content less than 200 ppm. Appearance: Fine Granular Purity: 94 % min Moisture: 1 % max Iron Content: 200 ppm max Copper content: 5 ppm max Wettability : 10 s max Packing:Packed in 20 kg craft paper bags Quantity per 20'FCL: 11 mt