cyanidin-3-glucoside is the main part of the black glutinous rice pigment.it is ethylether-insoluble. it is absolute a natural pigment abstracted from o.sativo l.subsp hiesn@hiesn ting by modern biotechnology.widely used in every kinds of foodstuff,beverage as black coloring. this product has been exported to eu, japan, usa, asia etc. the physical level and microbiological level can meet the export standards well. package: cardboard drums, with double aseptic food poly bags inside. or by cartons, with vacual aseptic food poly bags inside, 20kgs per carton with 8 bags inside,2.5kg per bag.