1.   An alternative agent is chlorine dioxide, a powerful though unstable germicide that is used in water purification.

2.   At a minimum, EPA plans to require an industry-wide switch from chlorine to chlorine dioxide.

3.   A new supply of chlorine dioxide must be obtained each month.

4.   Capitol Hill police spokesman Lt. Dan Nichols said the building had been decontaminated with both a liquid and a gas form of chlorine dioxide.

5.   Chlorine dioxide is widely used as a bleaching agent in paper mills and as a treatment in water treatment plants.

6.   Chlorine dioxide is a popular bleaching agent in wood pulp and has been used in recent years to disinfect thousands of water supplies in America.

7.   Chlorine dioxide is also used in bleaching paper and purifying water.

8.   ECF pulp does not use chlorine gas in bleaching, but does use chlorine dioxide, which is thought to be less environmentally damaging.

9.   Gases such as chlorine dioxide can reach out-of-the-way places but are potentially explosive.

10.   MacMillan Bloedel heavily diluted the chlorine dioxide and pumped it into the ocean below the tideline after consulting with the provincial regulators.