Products › Reference Standard CYN - 25 µg Image 1 of 2 Image 2 of 2 Reference Standard CYN - 25 µg $150.00 Dried reference material of cylindrospermopsin (CYN) in 25 µg quantity (shipping not included) Quantity: Purchase Added! Dried reference material of cylindrospermopsin (CYN) in 25 µg quantity (shipping not included)