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.

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Hach DPD Free Chlorine Reagent Powder Pillows, 5 mL, Pack of 100, 1407799

Hach DPD Free Chlorine Reagent Powder Pillows, 5 mL, Pack of 100, 1407799

Product ID: 23993764

Details

Brand
HACH
Item Form
Powder
Item Weight
0.02 kg
Package Size Name
100-Pack
Product Benefits
Maintains

📏3.5 mg/L Cl₂ Detection Range

📦100 Pre-measured Powder Pillows

🧪USEPA Certified Precision

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Description

💧 Stay ahead in water quality with precision you can trust!

VERSATILE WATER TESTING - Ideal for groundwater, municipal, and surface water quality assessments—stay ahead in water safety.
READY TO USE CONVENIENCE - Pre-measured 5 mL powder pillows in a 100-pack, perfect for routine or small-scale testing.
PRECISION YOU CAN COUNT ON - Detects free chlorine levels from 0 to 3.5 mg/L for reliable water quality monitoring.
SEAMLESS DEVICE COMPATIBILITY - Optimized for use with Hach colorimeters and spectrophotometers for flawless results.
CERTIFIED ACCURACY FOR CLEAN WATER - USEPA certified for trusted chlorine analysis in drinking and wastewater.

Hach DPD Free Chlorine Reagent Powder Pillows offer USEPA-certified accuracy for chlorine testing in drinking and wastewater. Each 5 mL pillow is pre-measured for convenience, supporting a testing range up to 3.5 mg/L Cl₂. Designed for seamless use with Hach colorimeters and spectrophotometers, this 100-pack is perfect for routine water quality monitoring across groundwater, municipal, and surface water applications.

Specifications

ASIN	B00N3YJBHS
Best Sellers Rank	#35,092 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #44 in Analytical Reagents
Brand Name	HACH
Customer Reviews	4.6 4.6 out of 5 stars (90)
Item Form	Powder
Item Weight	0.02 kg
Manufacturer	HACH COMPANY
Manufacturer Part Number	1407799
Model Number	1407799
Number of Items	1
Package Size Name	100-Pack
Product Benefits	Maintains Clean Sanitized Water
Unit Count	1 Count

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₩78407

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In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Korea.

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