Sodium vs. Potassium Permanganate

What is the difference?

Permanganate is a powerful oxidant which chemically reduces chlorinated ethene compounds quickly and effectively without forming daughter products such as dichloroethene and vinyl chloride. It can be provided as sodium and potassium salt. Both versions are equally effective in the same molar quantities. However, because sodium permanganate is more soluble (40% vs. 5%), it is easier to use and more flexible. Potassium permanganate is typically more economical and, because it cannot be made into a very concentrated solution, can be safer to handle.

Reaction Chemistry

From the reaction equations, it takes two moles of permanganate to oxidize one mole of contaminants PCE and TCE. The reaction follows second-order kinetics — the rate depends on concentrations of both the permanganate and the contaminant, as well as competing species such as reduced metals and natural organic matter. Increasing the concentration of permanganate increases the rate of reaction.

Application Methods

Permanganate is easily applied to most sites. The application method is determined by the geological characteristics of the site, type and concentration of contaminants, and physical limitations of the working space. Permanganate is only effective with dissolved-phase contaminants in the saturated zone. It is typically active for a few weeks to a few months depending on site conditions.

Packaging & Delivery

Hepure has relationships with product distributors positioned throughout the United States, allowing competitive shipping rates. Typical packaging: 40% sodium permanganate in drums, totes, or tankers; potassium permanganate in pails (55.1 lb) or drums (330 lb). Hepure also offers site-ready solutions — chemicals blended to order and ready to inject at your desired concentration.