Bleach loses activity quickly in the presence of organic debris and therefore should only be applied to clean surfaces. Reaction between chlorine bleach and amino acids from urine, body fluids and feces leads to formation of potentially toxic chloramines and chlorine gas. It is also important to use fresh solutions, as bleach is inactivated by sunlight and some metals. In addition to the strong odour, high concentrations of bleach that are required to kill viruses like parvo and calicivirus can be irritating to the eyes, skin, and mucous membranes. There are other commercial products like Virkon® that are more effective, safer for human and environmental exposure, and less damaging to clothing and surfaces.

The most efficient way to remove biofilm is by using an appropriate cleaner according to its recommended label directions. Cleaners contain high amounts of surfactants that penetrate, break down and detach the organic matter and/or mineral deposits found in the biofilm. They also contain emulsifiers to ensure that the soiling stays in suspension so that it can be rinsed off and removed from surfaces.

Virkon® is licensed as a disinfectant/cleaner that contains a surfactant and inorganic salts. After drying, a light surfactant and salt residue may remain. This residue can be easily removed with water or a damp cloth.

Although disinfectants may contain surfactants, these surfactants are present to help the active ingredient penetrate and adhere to the surface. Unlike cleaners, they are not meant to penetrate heavy layers of organic soiling or minerals; some disinfectant families are quickly neutralized by organic and mineral compounds. Disinfectants will work better on soiled surfaces that have been cleaned with a cleaner prior to disinfection.

Although hot water is better than cold water to detach and remove soiling, it is not as efficient as hot water with cleaner for dissolving fats. If the water is too hot, however, it may cook and “fix” proteins to surfaces. Wash water temperature should be less than 60 degrees C.

Virkon® has a pink dye indicator when mixed. Fading of the pink colour indicates the activity has decreased and it is time to replenish the solution. When the pink colour is gone and the solution becomes cloudy white, it is inactive. Direct sunlight will also cause the pink colour indicator to fade more rapidly.

Keep out of reach of children. Powder is irritating to eyes, skin, and mucous membranes. May be harmful if swallowed or inhaled. Do not get powder in eyes. Avoid contact of powder with skin. Handle in such a way as to minimize dust release. Consult the label for a full list of precautions and first aid advice.

Yes, Virkon® consists mainly of inorganic salts which decompose into harmless by-products.

1 mL of Virkon® powder weighs approximately 1 gram.