Features & Benefits
- Pack of 100 powder pillows
- Range: 0.02 - 2.00 mg/L Cl₂
- Sample Size: 10 mL
- USEPA accepted for reporting for drinking water analysis
- Boric Acid free
- *Not for medical applications or international shipping
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Item #:
2605181
Hach DPD Free Chlorine Reagent Powder Pillows, 10 mL, Pack of 100, 2105569 | Range 0.02-2.00 mg/L Cl2, USEPA Accepted Method 8021, Drinking Water and
Item #:
2605181
0 ratings
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For free chlorine determination by the DPD Free Chlorine method.
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What Stands Out
High Accuracy
These reagent powder pillows ensure precise measurement of free chlorine levels, allowing for reliable water treatment and quality control in various applications.
Convenient Packaging
The pack of 100 provides a cost-effective solution for frequent testing, with easy-to-use pillows that eliminate waste and reduce preparation time for users.
Versatile Application
Suitable for a range of environments from swimming pools to drinking water systems, catering to both residential and commercial needs for effective water safety management.
Product Details
- For free chlorine determination by the DPD Free Chlorine method
- USEPA accepted for reporting for drinking water analysis using Hach Method 8021
- Range: 0.02 - 2.00 mg/L Cl₂
- Sample Size: 10 mL
- Pack of 100 powder pillows
- Boric Acid free
| Package Weight | 1 Pound |
Dangerous Goods
To avoid the delay in customs clearance process for Dangerous Goods, the shipment shall be opened at our warehouse facility to check the severity of hazardous components. Please see the list of Dangerous goods here.
Who Should Buy?
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Pool Operators
Ideal for pool operators needing precise chlorine measurements for maintaining water quality and safety.
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Water Quality Testers
Perfect for water quality testers who require accurate free chlorine testing in various aquatic environments.
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Laboratories
Beneficial for laboratories conducting routine water analysis where free chlorine detection is crucial.
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Home Users
Not ideal for casual home users who may require simpler testing methods for chlorine levels.
Product Description
Hach DPD Free Chlorine Reagent Powder Pillows, 10 mL, Pack of 100, 2105569 | Range 0.02-2.00 mg/L Cl2, USEPA Accepted Method 8021, Drinking Water and Wastewater Analysis, Colorimeter Use
Dietary Supplement Disclaimer
Statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition.
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Customer Questions & Answers
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Question:
What are Hach 2105569 DPD Free Chlorine Reagent Powder Pillows used for?
Answer: Hach 2105569 DPD Free Chlorine Reagent Powder Pillows are specifically designed for testing free chlorine levels in water samples, such as drinking water and pool water. They provide a quick and reliable method for determining chlorine concentration which is essential for maintaining water quality. Regular monitoring using these reagent pillows helps ensure that sanitizer levels are appropriate, preventing issues related to water quality such as algae growth, which can compromise safety and aesthetic quality. -
Question:
How do I use the Hach DPD Free Chlorine Reagent Powder Pillows?
Answer: To use the Hach DPD Free Chlorine Reagent Powder Pillows, simply collect a water sample in a clean container, then add one powder pillow to the sample. After shaking the container for about 30 seconds to ensure the powder dissolves fully, compare the resulting color with the provided color chart. This simple method is incredibly effective in quickly assessing free chlorine levels, making it suitable for both pool staff and homeowners who want to keep their water clean and safe. -
Question:
What is the shelf life of Hach 2105569 DPD Free Chlorine Reagent Powder Pillows?
Answer: The shelf life of Hach 2105569 DPD Free Chlorine Reagent Powder Pillows is typically up to 24 months when stored properly. It's vital to keep them in a cool, dry place to maintain their effectiveness and accuracy in testing. Checking the expiration date on the packaging before use is a good practice to ensure accurate readings. Proper storage prolongs their usability, helping you stay consistent in monitoring your water quality. -
Question:
Are the DPD Free Chlorine Reagent Powder Pillows safe to use?
Answer: Yes, the Hach DPD Free Chlorine Reagent Powder Pillows are safe to use when handled properly. They are designed for environmental testing and chemical analysis. Although they are intended for water testing and not for consumption, following basic safety precautions—such as wearing gloves and goggles while handling—is always recommended. This ensures that the testing process is safe, especially when doing frequent tests at pools or treatment facilities. -
Question:
Can these reagent pillows be used for other water quality tests?
Answer: No, Hach 2105569 DPD Free Chlorine Reagent Powder Pillows are specifically formulated for measuring free chlorine. While they are not suitable for testing other substances, Hach provides an extensive range of specific reagents for different tests. This specialization ensures that you receive accurate measurements tailored to the type of water quality assessment you are performing, thus maintaining high standards of water safety. -
Question:
What is the packaging quantity and size of the Hach DPD Free Chlorine Reagent Powder Pillows?
Answer: The Hach DPD Free Chlorine Reagent Powder Pillows come in a pack of 100, with each pillow containing 10 mL of reagent powder. This packaging is designed for convenience and efficiency, allowing for numerous tests to be performed over time. Ideal for usage in both residential pools as well as commercial water testing, this bulk packaging ensures you have a continuous supply to monitor water quality, especially during peak usage times. -
Question:
How accurate are the Hach DPD Free Chlorine Reagent Powder Pillows?
Answer: Hach DPD Free Chlorine Reagent Powder Pillows are known for their high level of accuracy in measuring free chlorine levels in water. When used as directed, they provide reliable results that help maintain optimal water conditions. Accurate readings are crucial for ensuring that sanitation protocols are followed. This reliability makes the reagent pillows a popular choice among pool professionals and water treatment facilities alike. -
Question:
Can I use Hach DPD Free Chlorine Reagent Powder Pillows with any type of water sample?
Answer: While Hach DPD Free Chlorine Reagent Powder Pillows are primarily designed for pool and drinking water, they can also be used for other freshwater samples where free chlorine levels need to be assessed. However, for optimum results, it’s essential to ensure that the water sample is clear and representative of the body of water being tested, as contaminants could potentially affect the accuracy of the readings. -
Question:
Where can I buy Hach 2105569 DPD Free Chlorine Reagent Powder Pillows in Australia?
Answer: You can purchase Hach 2105569 DPD Free Chlorine Reagent Powder Pillows, 10 mL, Pack of 100 through Ubuy in Australia. Ubuy is a reliable online shopping platform offering a variety of products, making it a convenient choice for your water testing needs. -
Question:
What should I do if the color change is not visible after using the reagent pillows?
Answer: If you do not observe a color change after adding the Hach DPD Free Chlorine Reagent Powder Pillows to your water sample, it likely means the free chlorine levels are below the detection limit of the test. In such cases, closely check the mixing process; ensure that the pillow is fully dissolved. If problems persist, consider retesting with a fresh sample or consulting the testing instructions for troubleshooting tips, ensuring you accurately track your water quality.
HACH Analytical Reagents Editorial Review
Hach 2105569 DPD Free Chlorine Reagent Powder is a product that is designed for testing Free Chlorine levels in water samples. The product contains DPD, which is an indicator that changes color when oxidized, along with phosphoric acid for pH adjustment and a carboxylate salt. This complete kit is well packaged and easy to use with long use periods before expiration. The reagent can be used to perform Hach Method 8021, which has a range of 0.02-2.00 mg/L Cl2, or on some models of pocket colorimeters it can be used to perform method 10069 with a range of 0.1-8.0 mg/L Cl2. The product is designed for 10 ml as a size of sample. It can be used with a Hanna colorimeter if it is using the DPD method, but customers are suggested to check both methods for Hanna meter and Hach. For international delivery, the product can only be ordered directly from Hach's international department. The overall customer experience with this product is positive with satisfied customers returning to purchase it again. Customers have commented on the freshness of the product and the long expiry date. The product is delivered as expected and met all customers' needs. The product is manufactured by Hach but sold by many people, and customers have suggested checking the expiration date when the package is first received.
Customer Reviews & Ratings
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Pros
- Well packaged and easy to use
- Long use periods before expiration
- Can work with Hanna colorimeter if using DPD method
- Satisfied customers returning to purchase
Cons
- Can only be ordered directly from Hach's international department for international delivery
Platform Trust & Buyer Confidence
CJ
Chris
Verified buyer
“Promt delivery. Seems like a good product.”
22 July 2026 · via Trustpilot
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Scott
Verified buyer
“It was the best service ever received by any company from my online shopping experience in the last 10yrs”
11 July 2026 · via Trustpilot
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Terri
Verified buyer
“so easy to order delivery was way earlier than i expected”
3 July 2026 · via Trustpilot
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Gavin
Verified buyer
“Very impressed with the speed at which I received my package from the United States to Australia. Highly recommended.”
21-Jul-26 · via Trustpilot
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Jeannie
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“Very efficient service. Hassle-free. Excellent product. Have ordered several times.”
17-Jul-26 · via Trustpilot
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