Virkon is the brand name of a disinfectant comprised of potassium peroxymonosulfate, sodium chloride, sulphamic acid, malic acid, sodium hexametaphosphate (a buffer), sodium dodecyl benzene sulphonate (a detergent), amaranth color (an indicator), and lemon peel extract to provide a characteristic odor. The mixture is frequently used as a veterinary disinfectant, as well as in laboratories for cleaning up spills, soaking equipment or wiping benches. It has a remarkable spectrum of activity against viruses, fungi, and bacteria, including mycobacteria such as tuberculosis.

Virkon is most often sold as a pink-coloured powder, that is mixed with water to form a 1% or 2% solution (i. e. 10g or 20g per litre). The pink colour is useful in that in helps gauge the concentration when preparing the Virkon, and importantly, as the Virkon ages it discolours, making it obvious when it needs to be replaced. The solution is stable for 7 days.

Although stated to have a lemon scent, the smell of Virkon is very faint but still considered unpleasant to many. It is relatively safe in terms of skin contact, but should not be used as a hand-washing liquid.

A major disadvantage to using Virkon is the price. As a cost saving measure, many laboratories make their own disinfectants with relatively low cost solvents that can be purchased in bulk.

Tools

• Mobile H5N1 Decontamination Software assists in the precise determination of dilution ratio and quantity of UN FAO & AUSVETPLAN approved bird flu disinfectants (e.g. Virkon S) for an assortment of prevention & decontamination scenarios.

Disinfectants