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US 11,317,632 B2Granted
Materials amd methods for buffering active chlorine solutions
AssigneePharmocon LLC
InventorsJohn F O'Connell, Jr., James P Demers, Darryl C Rideout
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Abstract
The invention provides buffers stable to oxidants, including chlorine and hypochlorous acid, which are usable in the pH range 3-7. The invention also provides stable, buffered solutions comprising hypochlorous acid, having a pH between 3 and 7, and disposable wiping articles impregnated with these solutions.
Claims14
A buffered aqueous solution of hypochlorous acid, having a concentration of hypochlorous acid between 50 ppm and 1000 ppm and having a pH buffered in the range of 3 to 7, comprising an effective buffering amount of a soluble salt of a phosphonic acid of formula I
- wherein A is selected from the group consisting of aromatic rings, C5N C4N2 and C3N3 heteroaromatic rings, and C1-C10 alkyl groups;
- and wherein
- n is 0-5 when A is aromatic;
- n is 0-4 when A is C5N heteroaromatic;
- n is 0-3 when A is C4N2 heteroaromatic or C1-C10 alkyl;
- and
- n is 0-2 when A is C3N3 heteroaromatic.
4 more elements
Dependencies are inferred from the claim text.