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rajiv ji,

Actually twin oxide is only the brand name and basically the chemical name is chlorine dioxide. Surely it is a better and powerful disinfectant than chlorine i.e. bleaching powder or hypo-chlorites. in contrast to chlorine, clo2 does not react with water to hydrolyse, although it does disproportionate to chlorite and chlorate.

in field chlorine dioxide can be determined diethyl phenylene diamine sulphate(dpd) if the dosage given is as recommended (0.2-0.3 ppm), the solution gives red colour when mixed with water having clo2. in very low dosages it is difficult ot measure in field.

Advantage of this disinfectant is that it can work between wide ph range (4-8.4) whereas it is not possible in case of chlorine compounds. it is very effective on viruses..

the main disadvantages are, it is costlier and chlorite and chlorate formed in the water are toxic however the investigations have shown that in low quantities the said substances are not toxic at all.



Amit Kr. Singh,
Govt. of Haryana,
Public Health Engg. Department,
Water Testing Lab,Karnal-132001(haryana)


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