is this product interchangeable with Hach 2105569?

I don't believe so. The Hach 2105569 takes a 10ml sample and is best used in a Hach machine. The Barnant 1407799 takes a 5ml sample and is used in the Hach visual measurement kit. I use a Hach visual kit with the Barnant 1407799.

Can these reagent pillows be used in another colorinator that is not the Hach brand? I have a Hanna free-chlorine chlorinator coming.

It could be considered but we cannot confirm they will give the correct result. If you want to try it, it would be best to do so with a known solution of chlorine or side by side comparing results to the proper manufacturers reagent.

what is the difference between "free" and "total" chlorine?

Free chlorine is the amount of non-reacted available chlorine in a system. Total Chlorine is the amount of compost chlorine in a system including free chlorine, and reacted chlorine like chloramines.

DPD Free Chlorine Reagent Powder Pillows, 5 mL, Pack of 100, Range from 3.5 mg/L Cl₂, USEPA Accepted Method 8021, Drinking Water & Wastewater Analysis, for Use with Colorimeter, 1407799

Product ID: 23993764

Details

Brand
HACH
Item Form
Powder
Item Weight
0.02 Kilograms
Number of Items
1
Product Benefits
Maintains

📏3.5 mg/L Cl₂ Testing Range

📦100 Pre-measured Powder Pillows

🧪USEPA Certified Quality

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฿3113

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay ahead in water quality testing with precision and ease!

PROVEN RELIABILITY - Backed by 20+ years of trusted DPD method expertise and glowing user satisfaction.
PRECISION YOU CAN TRUST - EPA-accepted Method 8021 ensures industry-leading accuracy for chlorine analysis.
EFFORTLESS ROUTINE TESTING - Pre-measured 5 mL powder pillows streamline your workflow—no guesswork, no mess.
SEAMLESS DEVICE COMPATIBILITY - Optimized for Hach colorimeters and spectrophotometers for instant, reliable results.
VERSATILITY ACROSS WATER TYPES - Perfect for groundwater, municipal, and surface water quality monitoring.

Hach DPD Free Chlorine Reagent Powder Pillows offer EPA-certified, highly accurate chlorine measurement in a convenient 100-pack format. Designed for seamless use with Hach colorimeters, these pre-measured 5 mL powder pillows support reliable water quality testing across drinking water, wastewater, and environmental applications.

Specifications

ASIN	B00N3YJBHS
Best Sellers Rank	#67,578 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #95 in Analytical Reagents
Brand Name	HACH
Customer Reviews	4.6 4.6 out of 5 stars (88)
Item Form	Powder
Item Weight	0.02 Kilograms
Manufacturer	HACH COMPANY
Product Benefits	Maintains Clean Sanitized Water
Unit Count	1.0 Count

Reviews

R**S

Convenient

Used with Chlorine Tester for water - Convenient - Easy to use.

12.07.2021

A**R

As Advertised

I have used this product for 5+ years and am very satisfied with it.

1.01.2020

C**N

Received quickly

Use to test chlorine. Works well. Price has increased alot though.

24.01.2024

H**D

Better than we thought!

This product was actually a Hach product which is what we were looking for. It worked our perfectly for us!

6.05.2017

A**R

As expected

On time and arrived as expected.

26.06.2019

N**L

Barnant DPD Free Chlorine, Powder-5ml

Repeat purchase-suits my needs as expected! Works with Hach chlorinator measurement tools.

29.08.2017

R**A

Disappointed

I'm disappointed in the pouches because they are sealed very low on the pouch, which makes it difficult to open. It's like these are seconds. I've worked with this product for 6 months prior to buying them from Amazon. I've never had this problem before. There is a, tear here, cut on the package but it is sealed below the cut.

26.04.2020

D**N

does its job

works like it is suppose to

3.08.2018

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