Patent ID: 7550422

Claim:
A composition comprising an effective metal-complexing dye in an uncomplexed form and from about 0.1 wt % to about 40 wt % of a surfactant, wherein the metal complexing dye is wherein A is two hydrogens on the respective ring structures; D is selected from hydrogen, —CH 3 or —CH(CH 3 ) 2 ; G is —CH 2 N(CH2COOH) 2 ; J is selected from hydrogen or —CH 3 ; -L-M is O; Q-R is —C═O; T is selected from hydrogen or —CH 3 ; U is —CH 2 N(CH 2 COOH) 2 ; V is —OH; W is selected from hydrogen, —CH 3 or CH(—CH 3 ) 2 .