Cyanidin-type anthocyanins is the most abundant in black/red berries. Our cyanidin reference material : Cyanidine-3-glucoside chloride, so called  Kuromanin chloride, is a anthocyanin reference material broadly used in many monographs and pharmacopeias as a standard to calibrate anthocyanins content of extracts or herbal products. Our cyanidin standards list covers almost all commonly identified cyanidins found in herbal products.