Cleaning composition and method for using the same

1. A cleaning composition comprising at least one surfactant and at least one colorant, wherein the cleaning composition exhibits a pH of about 3 or less, and wherein the at least one colorant is selected from the group consisting of colorants conforming to a structure of Formula (II), (III), or (IV) below at a pH of about 7

wherein R′ is selected from the group consisting of hydrogen and R 2 ; R″ is selected from the group consisting of hydrogen and R 3 ; R 16 is selected from the group consisting of hydrogen, hydroxyl, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, and —SO 3 − D; R 17 is selected from the group consisting of hydrogen, hydroxyl, C 1 -C 4 alkyl, and C 1 -C 4 alkoxy; and Z is selected from the group consisting of substituents conforming to a structure of Formula (IIA), (IIB), (IIC), or (IID)

wherein R 21 is selected from the group consisting of hydrogen, —CO 2 − M, and SO 3 − D; and R 22 and R 23 are independently selected from the group consisting of hydrogen and —SO 3 − M;

wherein R 31 and R 32 are independently selected from the group consisting of hydrogen and —SO 3 − M; and R 33 is selected from the group consisting of hydrogen and hydroxyl;

wherein R 41 and R 42 are independently selected from the group consisting of hydrogen, C 1 -C 4 alkyl, alkoxy, —SO 3 − M, —CO 2 − M, and —NO 2 ;

wherein R 51 is selected from the group consisting of hydrogen and C 1 -C 4 alkyl; R 52 and R 53 are each independently selected from the group consisting of hydrogen, alkyl, alkyl ester, cyano, aryl, amide, nitro, alkanoyl, aryloyl, a sulfonic acid group, and halogen; each M is independently selected from the group consisting of metal cations; and wherein each D is independently selected from the group consisting of M and a quaternary ammonium group conforming to the structure of Formula (X)

provided if R′ and R″ are both hydrogen then Z is a substituent conforming to the structure of Formula (IIA) and at least one of R 16 and R 21 is —SO 3 − D in which D is a quaternary ammonium group conforming to the structure of Formula (X);

wherein R 61 is selected from the group consisting of hydrogen, hydroxyl, and —NHR 64 ; R 64 is selected from the group consisting of hydrogen, R 2 , and E; R 62 is selected from the group consisting of aryl groups, R 3 , and G; R 63 is selected from the group consisting of hydrogen and —O—R 5 —R 6 , provided that R 63 is —O—R 5 —R 6 when R 61 is hydrogen or —NHR 64 , R 64 is hydrogen, and R 62 is an aryl group; E is a group conforming to the structure of Formula (XI)

wherein k is an integer from 1 to 10; m is an integer from 0 to 10; G is a group conforming to the structure of Formula (XII)

wherein n is an integer from 1 to 10; p is an integer from 0 to 10; and when R 61 is —NHR 64 , R 64 is E, and R 62 is G, the sum of m and p is from 1 to 10;

wherein R 81 is selected from the group consisting of C 8 -C 20 alkanoyl groups and C 8 -C 20 alkenoyl groups;

wherein R 2 is selected from the group consisting of —R 4 —O—R 5 —R 6 , R 3 is selected from the group consisting of —R 4 —O—R 5 —R 6 and a bond to R 15 when R 15 is an alkanediyl group, R 4 is selected from the group consisting of alkanediyl groups and arenediyl groups; R 6 is selected from the group consisting of hydrogen, alkyl groups, alkanoyl groups, alkenoyl groups, and aryloyl groups; and R 5 is a divalent substituent selected from the group consisting of:

(i) divalent substituents comprising two or more divalent repeating units independently selected from repeating units conforming to the structure of Formula (XX)

wherein R 101 and R 102 are independently selected from the group consisting of hydrogen, alkyl, hydroxyalkyl, aryl, alkoxyalkyl, and aryloxyalkyl;

(ii) divalent substituents conforming to the structure of Formula (XXI)

wherein R 111 and R 112 are independently selected from the group consisting of hydrogen, hydroxyl, and C 1 -C 10 alkyl, c is an integer from 1 to 12, and d is an integer from 1 to 100;

(iii) divalent substituents conforming to the structure of Formula (XXII)

wherein R 121 and R 122 are independently selected from the group consisting of hydrogen, hydroxyl, and C 1 -C 10 alkyl, e is an integer from 1 to 12, and f is an integer from 1 to 100;

(iv) divalent substituents conforming to the structure of Formula (XXIII)

wherein R 131 , R 132 , and R 133 are independently selected from alkyl and hydroxyalkyl, and h is an integer from 1 to 100; and

(v) divalent substituents comprising two or more substituents selected from the group consisting of substituents conforming to a structure of Formula (XX), (XXI), (XXII), or (XXIII).

2. The cleaning composition of claim 1 , wherein the colorant conforms to the structure of Formula (V)

wherein R 21 is selected from the group consisting of hydrogen and —CO 2 − Na + ; R 22 and R 23 are independently selected from the group consisting of hydrogen and —SO 3 − Na + .

3. The cleaning composition of claim 1 , wherein the colorant conforms to the structure of Formula (VI)

wherein R 31 and R 32 are independently selected from the group consisting of hydrogen and —SO 3 − Na + ; R 33 is selected from the group consisting of hydrogen and hydroxyl; R 34 is selected from the group consisting of hydrogen and C 1 -C 4 alkyl.

4. The cleaning composition of claim 1 , wherein the colorant conforms to the structure of Formula (VII)

wherein R 41 and R 42 are independently selected from the group consisting of hydrogen, C 1 -C 4 alkyl, alkoxy, —SO 3 − M, —CO 2 − M, and —NO 2 .

5. The cleaning composition of claim 1 , wherein the colorant conforms to the structure of Formula (VIII)

wherein R 51 is selected from the group consisting of hydrogen and C 1 -C 4 alkyl; R 52 and R 53 are independently selected from the group consisting of hydrogen and C 1 -C 4 alkoxy.

6. The cleaning composition of claim 1 , wherein the colorant conforms to the structure of Formula (IX)

wherein at least one D is a quaternary ammonium group conforming to the structure of Formula (X).

7. The cleaning composition of claim 1 , wherein R 5 is a divalent substituent comprising two or more divalent repeating units independently selected from repeating units conforming to the structure of Formula (XX).

8. The cleaning composition of claim 1 , wherein R 5 is a divalent substituent conforming to a structure of Formula (XXA), (XXB), or (XXC)

wherein s, t, and v are selected from the group consisting of zero and positive integers; and the sum of s, t, and v is 2 or more.

9. The cleaning composition of claim 1 , wherein the colorant is present in the composition in an amount of about 0.01 wt. % to about 1 wt. % based on the total weight of the composition.

10. The cleaning composition of claim 1 , wherein the composition further comprises an acid selected from the group consisting of mineral acids, organic acids, and mixtures thereof.

11. The cleaning composition of claim 1 , wherein the composition comprises a surfactant selected from the group consisting of alcohol ethoxylates, amine ethoxylates, fatty acid amides, and mixtures thereof.

12. The cleaning composition of claim 1 , wherein the surfactant is present in the composition in an amount of about 0.5 wt. % to about 20 wt. %.