Name the compound formed by coupling reaction of 4-aminobenzenesulfonic acid and N, N-dimethylbenzenamine and give its one use.

Explanation

To solve the question regarding the coupling reaction of 4-aminobenzenesulfonic acid and N,N-dimethylbenzenamine, we will follow these steps:

### Step 1: Identify the Reactants
The two reactants in this coupling reaction are:
1. **4-aminobenzenesulfonic acid** (also known as para-aminobenzenesulfonic acid)
2. **N,N-dimethylbenzenamine**

### Step 2: Write the Structures of the Reactants
...