[Merck Millipore Corporation] Spectroquant(R) Chlorine Reagent Cl2-1 (Liquid) for DPD Method And Chlorine Test (0.010 - 6.00mg/L Cl2) Free Available Chlorine: Reagent Cl2-1 And Reagent Cl2-2 Are Required Total Chlorine: Reagent Cl2-1 And Reagent Cl2-2, Reagent Cl2-3 Are Required 200 Tests 100086 200Tests