A number of products are marketed as "stabilized chlorine dioxide" (SCD). Most of these solutions do not actually contain chlorine dioxide but consist of solutions of buffered sodium chlorite(which is the stuff to which Duane refers) . A weak acid can be added to SCD to "activate" it and make chlorine dioxide in-situ without a chlorine dioxide generator.
When actual Chlorine Dioxide is used, it is ordinarily almost always used as a dissolved gas in water in a concentration range of 0.5 to 10 grams per liter.Its solubility increases at lower temperatures: it is thus common to use chilled water (5 °C or 41 °F) when storing at concentrations above 3 grams per liter.
Chlorine dioxide gas may not be transported at any concentration and is almost always produced at the application site using a chlorine dioxide generator (i.e by electrolysis of brine).
In fact, one of the unused byproducts at one electrode of the "electrolysed water" of Zerorez is Chlorine Dioxide, whereas the used portion is the product of the other electrode, that being Sodium Hydroxide dissolved in water.
So Larry, do you sell sodium chlorite or chilled dissolved Chlorine Dioxide?