Importance

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Abstract

The invention relates to a shelf stable liquid disinfectant concentrate composition containing at least 1% by weight of a quat biocide (biocidally active quaternary ammonium compounds) and capable of dilution with 20 parts of water to 1 part of concentrate to produce a diluted solution, the diluted solution exhibiting a MIC after 24 hours in the presence of up to 2% tryptone (or the protein equivalent thereof) which is less than the MIC of a simple solution of the same concentration of the same quat biocide in water in the presence of the same concentration of the protein. The biocidal efficacy of the quat biocide may be protected by an 'activity protector' selected from the group consisting of 'enzyme stabilisers', 'enzyme stabilising systems', micelle formation modifiers and inhibitors, and combinations thereof. The invention also relates to a disinfectant working solution prepared from the concentrate, and to a method of protecting a quat biocide from deactivation.

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First Claim