Taylor DPD Powder Reagent, .25 lb | R-0870-JTaylor DPD Powder Reagent, 0. 25 lb (4 oz) R0870J The **Taylor R0870J** provides a full 0. 25 lb (113 g) container of DPD reagent powder formulated for free and combined chlorine testing (FAS DPD method) with Taylor test kits. Key Features: Uses FAS DPD method with reagents R0871 and R0003 to measure free and combined chlorine Large 4 oz supplyideal for frequent testing at commercial or residential pools Very economical per test cost when compared to