Lovibond Replacement Reagents for CHECKIT Comparator: Dechlor Tablets, Range: 0.02 to 1mg/L, White, Composition: Sodium Nitrite 2.5 to 5%, non-hazardous components 90 to 100%, Format: Tablet, For Use With: Water analysis, Colorimeter and spectrophotometer, Method: Zincon/EDTA, pH Range: 6.1