Patent ID: 6368864
Filing Date: 2002-04-09
Classification: C09B,G01N,Y10S,Y10T

Abstract:
A dye composition comprising(a) a dye having the formula: wherein,n is 0, 1, 2, or 3; R1 is H, alkyl, or an alkoxy group; R2 is CH2(CH2)mOH, wherein m is 0, 1, 2, or 3; X is O, S, or C(CH3)2; R is CH3, CH(CH3)2, CH2CH2OH, alkyl, alkylsulfonate, or hydroxyalkyl and Bâˆ’ is a counteranion; and (b) one or more components selected from the group consisting of a surfactant, a preservative and a sulfonic acid or a salt thereof.