Virox Technologies Inc.

Jose A Ramirez

Navid Omidbakhsh

Michael J Rochon

Nancy M A Sullivan

An aqueous disinfecting solution and dry powdered composition which may be dissolved in water to provide the solution. The solution has a pH of from 0.6 to 7 and comprises (a) hydrogen peroxide in a concentration of from 0.01 to 6% w/w; and (b) at least one component chosen from cyclic carboxylic acids and aromatic alcohols, in a concentration of from 0.01 to 4 w/w %, all based on the total weight of the solution. The cyclic carboxylic acids are preferably 2-furan carboxylic acid, benzoic acid and salicylic acid. Furthermore, the solution preferably contains at least one C6-C12 alkyl diphenyl oxide sulfonate surfactant and a nonionic surfactant. Additional optional ingredients include anionic surfactants, corrosion inhibitors, cation sequestering agents, and buffers.

Hydrogen peroxide disinfectant containing a cyclic carboxylic acid and/or aromatic alcohol

An acidic aqueous hydrogen peroxide solution is provided with improved disinfectant activity. Concentrated solutions preferably contain up to about 8 wt./wt. % H2O2 and as-used concentrations contain about 0.5% wt./wt. % H2O2. The solution also contains from 0.05 to 8.0 wt./wt. % of at least one phosphorous-based acid, e.g. phosphoric acid and/or a phosphonic acid with from 1 to 5 phosphonic acid groups, and from 0.02 to 5 wt./wt. % of at least one anionic surfactant. The surfactant is selected from C8 to C16 alkyl aryl sulfonic acids, sulfonated C12 to C22 carboxylic acids, C8 to C22 alkyl diphenyl oxide sulfonic acids, naphthalene sulfonic acids, C8 to C22 alkyl sulfonic acids, and alkali metal and ammonium salts thereof, and alkali metal C8 to C18 alkyl sulfates, and mixtures thereof. Most preferably the solution has an emulsifier and/or hydrotrope, e.g. an alkylated sulfonated diphenyl oxide salt, an alkyl aryl polyoxyethylene surfactant, and/or a polyoxyethylene surfactant. The solution may also contain corrosion inhibitors and/or lower alcohols.

Hydrogen peroxide disinfectant with increased activity

A low-foaming cleaning solution and dry particulate formulation which can be diluted with water, deionized water, or mixtures thereof, to form the cleaning solution. The cleaning solution has an alkaline pH, which is preferably from about 8 to about 11.5 and consists essentially of at least one low foaming surfactant in a concentration of from about 0.005% to about 40% w/w of the total solution, at least one active oxygen releasing compound in an amount effective to produce a hydrogen peroxide concentration of from about 0.005% to about 50% w/w of the total solution, at least one builder in a concentration of from about 0.001% to about 50% w/w of the total solution, and at least one diluent selected from the group consisting of water, deionized water, and mixtures thereof. The at least one surfactant is selected from the group consisting of C -C alkane sulfonates, C -C alkyl sulfates, C -C alkyl naphthalene sulfonates, polyoxyethylene/polyoxypropylene block copolymers having a polyoxypropylene molecular weight of from about 1500 to about 8500, of which less than about 30% of the total molecular weight is due to the polyoxyethylene portion, and mixtures thereof. The at least one active oxygen releasing compound is selected from the group consisting of hydrogen peroxide, at least one source of hydrogen peroxide, and mixtures thereof.

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Mississauga, Canada

Jose A Ramirez