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LaMotte™ DPD Free Chlorine Reagent Refills

The liquid alternative to DPD tablet refills

Manufacturer:  LaMotte™ P6741H/DEL

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Catalog No. 22-278-646

This item has been discontinued and is no longer available. Please call customer service for assistance: 1-800-766-7000.
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Keep out of reach of children. May irritate eyes and skin. Harmful if swallowed.



  • DPD £1A and DPD £1B test Free Available Chlorine (Cl)
  • DPD £3 is added to the reacted sample to measure Total Cl
  • Comes in 30mL and 60mL sizes

DPD = N, N-Diethyl-1, 4-phenylene-diamine sulfate

Use with existing LaMotte chlorine comparators or colorimeters. For each test, all three reagents are added to the same sample. Ideal for testing drinking water, food and beverage, pool and spa, industrial water boiling and cooling, laundry and sanitation, water and wastewater.



DPD 1B Liquid Reagent
LaMotte™ colorimeters and comparators
2 oz.
Measurement of total chlorine, provides quicker results and clearer colors than tablets
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