This color disc test kit uses powder DPD reagent that reacts with chlorine more quickly than tablet-form DPD, giving more accurate results. Powder DPD also has a considerable advantage over orthotolidine, a hazardous substance sometimes used as a free and total chlorine test reagent. Hach Chlorine Test Kits are manufactured by Hach to ensure compliance with stringent quality control standards. Kit contains 100 tests.

*This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.
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 	<li>Quickly and accurately measures free and total chlorine levels in the field or in the lab</li>
 	<li>Simple and fast color disc method</li>
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