The LaMotte 30ml DPD 1A Free Chlorine Reagent, designated by product code P-6740-G, is a vital and precise component used in water testing and analysis, specifically for measuring free chlorine levels in various water environments. This reagent is manufactured by LaMotte, a reputable name in water testing and environmental monitoring equipment, and is designed to provide accurate and dependable results for water quality assessment.

Key Features:

  • Free Chlorine Testing: The DPD 1A reagent is formulated for the measurement of free chlorine levels in water, a critical parameter for ensuring water quality and safety.
  • 30ml Volume: Each container contains 30 milliliters of reagent, providing a sufficient supply for numerous testing sessions.
  • Precise Results: The reagent is engineered to deliver precise and consistent results, making it a fundamental tool for water quality analysis.
  • Easy to Use: The reagent is straightforward to use, requiring minimal preparation and no specialized equipment for testing.
  • Broad Applications: This reagent is suitable for a wide range of applications, including pool and spa water testing, drinking water analysis, industrial water treatment, and environmental monitoring.
  • Accurate Water Monitoring: Regular use of the DPD 1A reagent allows for accurate monitoring of free chlorine levels, helping to ensure water safety and proper water treatment.
  • Safe Handling: The reagent is typically designed with safety in mind, and it should be handled following the manufacturer's guidelines and safety precautions.


  1. Prepare the water sample you wish to test, ensuring it is representative of the water you want to analyze.
  2. Follow the manufacturer's instructions for using the LaMotte 30ml DPD 1A Free Chlorine Reagent (Model P-6740-G) for free chlorine testing, including the recommended dosage.
  3. Add the reagent to the water sample as per the instructions.
  4. Mix the reagent and water thoroughly to ensure a complete reaction.
  5. Allow the specified reaction time for the color to develop.
  6. Use a color comparator or a photometer, as recommended by the manufacturer, to compare the resulting color with established standards and determine the free chlorine concentration in the water.
  7. Take appropriate actions based on the test results, such as adjusting chlorine levels to ensure water safety and quality.

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