Chlorine dioxide

The dioxide of chlorine (or chlorine dioxide) is a reddish Gaz yellow, of ClO2 formula, which is one of various the known Oxyde S of the Chlore. The chlorine dioxide is relatively stable in its states gas and liquid, but prompt to explode. In practice, one never uses it in a pure state.

Uses

disinfection off toilets and Bleach ing off Flour and Wood pulp. It edge also Be used for air disinfection, and was the principal agent used in the decontamination off buildings in the United States after the 2001 carbuncles attacks. Effective It is against Virus be, bacteria and Protozoa - including the Cyst S off Giardia and the Oocyst S off Cryptosporidium . This distinguishes it from chlorine, which has been used for more than has century ace the standard toilets disinfectant. Chlorine dioxide was introduced ace has drinking disinfectant toilets one has broad scale in 1956, when Brussels, Belgium, changed from chlorine to chlorine dioxide.

Recently, after the disaster off Hurricane Katrina in New Orleans, Louisiana and the surrounding GULF Coast, Chlorine Dioxide has been used to eradicate dangerous Mold from houses innundated by toilets from massive flooding. --->

Preparation

Sodium chlorate in has strong acid solution with has suitable Reducing agent (for example, Hydrogen peroxide, Sulfur dioxide, but Hydrochloric acid):

2ClO3- + 2Cl- + 4:00 +   →   2ClO2 + Cl2 + 2:00 2O

However, this reaction is off little practical been worth for disinfection applications. Ace has disinfectant, chlorine dioxide is almost exclusively produced by either the Chlorite - chlorine method:

2 NaClO2 + Cl2   →   2 NaCl + 2 ClO2

however the chlorite - hydrochloric acid method:

5 NaClO2 + 4 HCl   →   5 NaCl + 4 ClO2 + 2:00 2O

To lath has gained the reputation off generating year almost chlorine-free product in high yields (nominally >95% with modern generators). -->

The chlorine dioxide can be produced by chlorine gas and sodium chlorite action. 2 NaClO2 + Cl2 <> 2 ClO2 + 2 NaCl. It is explosive if its concentration in the air exceeds 10%. It cannot thus be stored and conveyed in a station, it must thus be prepared in situ.

References

  • National Library off Medicine (US)

  • WebElements
    • Standard
  • NIST Refers Database
  • European Chemicals Bureau

External bonds

  • National Pollutant Inventory - Chlorine dioxide

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