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Orthotolidine Solution

The Orthotolidine Reagent for Free Chlorine in Water. ORTHOTOLIDINE is most coomon test Reagent to detect Chlorine during Water distillation, Salts, Hypochlorite, Alkalinity process.

Orthotolidine used as a qualitative test for detection of minute amounts of free chlorine and hypochlorites.

With small amounts of free chlorine, a deep yellow color is produced with the orthotolidine reagent.

During tratment with hypochlorite, a green color appeared which gradually deepened and changed to yellow and finally to deep red as the concentration of free chlorine increased.

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