Sulfonic acid, carboxylic acid, and salts thereof

A compound represented by the following formula:

• wherein
• R1 is a methyl group;
• R2 and R4 are each individually H or a substituent, wherein the substituent is selected from the group consisting of a halogen atom, a C1-C10 linear or branched alkyl group, a C3-C10 cyclic alkyl group and a hydroxyl group;
• R3 is a C1-C10 alkylene group;
• n is an integer of 1 or greater;
• p and q are each individually an integer of 0 or greater;
• a sum of n, p, and q is an integer of 8 or greater;
• A is —SO3X or —COOX, wherein X is NR54, imidazolium, or phosphonium, where R5s are each H or a non-substituted alkyl group and are the same as or different from each other and at least one R5 among four of R5s is H;
• and
• L is a single bond, —CO2—B—*, —OCO—B—*, —CONR6—B—*, —NR6CO—B—*, or —CO—, where B is a single bond or a C1-C10 alkylene group, R6 is H or a C1-C4 alkyl group, and * indicates the bond to A in the formula.