The US and international catalog number is
102-15 (1 x 250 Acid Dissociating Reagent (R1); 1 x 0.75 g Ascorbic Acid (R1)) & (1 x 250 Acid Dissociating Diluent (R1); 1 x 125 mL Color Reagent (R2))
102-25 (1 x 500 Acid Dissociating Reagent (R1); 1 x 1.5 g Ascorbic Acid (R1)) & (1 x 500 Acid Dissociating Diluent (R1); 1 x 250 mL Color Reagent (R2)).