Most Widely used DPD Chlorine Tablets for Determining Free and Combined Chlorine DPD chlorine tablets employ DPD indicator (diethyl-p- phenylenediamine) to distinguish levels of free, combined, and total chlorine in a simple test sample. DPD chlorine tablets designated “Instrument…

Tests the quality of water, this DPD #1 IG tablets in a blister pack comes in 50 pieces per box.