Patent ID: 8921299

Claim:
A detergent composition comprising: a) from about 0.015% by weight to about 10% by weight of the composition of tiron (1,2-dihydroxybenzene-3,5-disulfonic acid, or mono- or di-sulfonate salts of the acid), b) from about 0.015% by weight to about 10% by weight of the composition of a ligand capable of chelating to Fe 3+ , wherein the ligand has a binding constant for Fe 3+ that is greater than 10 18 M −1 , and wherein the ligand is selected from the group consisting of aminocarboxylates containing at least two N atoms, aminophosphonates containing at least two N atoms, and geminal bisphosphonates, c) an iron-displacing species selected from the group consisting of i) phenyl boronic acid, ii) A1 3+ ′ and iii) mixtures thereof; and d) at least about 0.2 ppm Fe 3+ .