While chlorine dioxide has “chlorine” in its name, its chemistry is radically

different from that of chlorine. As we all learned in high school chemistry, we can mix two

compounds and create a third that bears little resemblance to its parents. For instance,

by mixing two parts of hydrogen gas with one of oxygen - liquid water is the formed. We

should not be misled by the fact that chlorine and chlorine dioxide share a word in

common. The chemistries of the two compounds are completely different. Chlorine and

chlorine dioxide are both oxidizing agents (electron receivers).

However, chlorine has the capacity to take in two electrons, whereas chlorine dioxide can

absorb five.

This means that, mole for mole, ClO2 is 2.6 times more effective than chlorine

If equal, if not greater importance is the fact that chlorine dioxide will not react with many

organic compounds, and as a result ClO2 does not produce environmentally dangerous

chlorinated organics. For example; aromatic compounds have carbon atoms arranged in

rings and they may have other atoms, such as chlorine, attached to these rings, to form a

chlorinated aromatic - a highly toxic compound that persists in the environment long after

it is produced.

Chlorine dioxide's behavior as an oxidizing agent is quite dissimilar. Like ozone, the

predominant oxidation reaction mechanism for chlorine dioxide proceeds through a

process known as free radical electrophilic (i.e. electron-attracting) abstraction rather than

by oxidative substitution or addition (as in chlorinating

agents such as chlorine or hypochlorite).

This means that chlorinated organic compounds such as THMs and HAAs are not

produced as a result of disinfection using chlorine dioxide.

While chlorine dioxide has

“chlorine” in its name, its chemistry

is radically different from that of

chlorine.

As we all learned in high school

chemistry, we can mix two

compounds and create a third that

bears little resemblance to its

parents.

For instance, by mixing two parts

of hydrogen gas with one of

oxygen - liquid water is the formed.

We should not be misled by the

fact that chlorine and chlorine

dioxide share a word in common.

The chemistries of the two

compounds are completely

different. Chlorine and chlorine

dioxide are both oxidizing agents

(electron receivers).

However, chlorine has the capacity

to take in two electrons, whereas

chlorine dioxide can absorb five.

This means that, mole for mole,

ClO2 is 2.6 times more effective

than chlorine

If equal, if not greater importance

is the fact that chlorine dioxide

will not react with many organic

compounds, and as a result ClO2

does not produce environmentally

dangerous chlorinated organics.

For example; aromatic

compounds have carbon atoms

arranged in rings and they may

have other atoms, such as chlorine,

attached to these rings, to form a

chlorinated aromatic - a highly

toxic compound that persists in

the environment long after it is

produced.

Chlorine dioxide's (CLO2)

behavior as an oxidizing agent is

quite dissimilar. the predominant

oxidation reaction mechanism for

chlorine dioxide proceeds

through a process known as

free radical electrophilic

(i.e. electron-attracting)

abstraction rather than by

oxidative substitution or addition

(as in chlorinating agents such as

chlorine or hypochlorite).

This means that chlorinated

organic compounds such as

THMs and HAAs are not produced

as a result of disinfection using

chlorine dioxide