Selenium AA Standard, 1000ppm, available in 500mL (No. 154534-1) and 125mL (No. 154534-6) poly bottles.Selenium Dioxide-dilute Nitric Acid (1mL = 1mg Se).Shipping: Corrosive Liquid, Acidic, Inorganic, N.O.S. (Nitric Acid)/UN3264.