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Chlorine HR tablet

0 - 4 mg/l Cl2 Mark as favourite

Chlorine is the most popular and widely used of the disinfectants. The chlorination of water supplies, swimming pools and cooling tower waters are but a few of the everyday applications.

Free Chlorine (hypochlorous acid) reacts with Ammonia and certain Nitrogenous compounds to form Combined Chlorine. With Ammonia, the reaction produces chloramines which have very little disinfecting power, thus it is important to be able to determine the various fractions of Chlorine present at any one time.

DPD (NN Diethyl p Phenylene Diamine Sulphate) is the preferred reagent for the determination of Free, Combined and Total Chlorine. It is available in Tablet, Liquid and Powder form. A list of compatible instrumentation and test kits can be found below.

Total Chlorine can also be measured using a Potassium Iodide reagent. This can measure concentrations of up to 300 mg/l chlorine and is widely used in food manufacturing and industrial water treatment.


  • Disinfection Control
  • Waste Water Treatment
Product finder
Title Disc Parameter Reading Part Number Mark as favourite
CHECKIT Disc Chlorine DPD 0 / 0,2 / 0,4 / 0,6 / 0,8 / 1,0 / 1,2 / 1,4 / 1,6 / 1,8 / 2,0 / 2,5 / 3,0 / 3,5 / 4,0 146020
Title Packaging Unit Part Number Mark as favourite
DPD No. 1 Rapid Tablet / 100 511310BT
DPD No. 1 Rapid Tablet / 250 511311BT
DPD No. 1 Rapid Tablet / 500 511312BT
DPD No. 3 Rapid Tablet / 100 511290BT
DPD No. 3 Rapid Tablet / 250 511291BT
DPD No. 3 Rapid Tablet / 500 511292BT
DPD No. 4 Rapid Tablet / 100 511570BT
DPD No. 4 Rapid Tablet / 250 511571BT
DPD No. 4 Rapid Tablet / 500 511572BT
Title Part Number SDS Country Direct Download
DPD No_ 3 Rapid 00511291
DPD No_1 Rapid 00511311
DPD No_4 Rapid 00511571