Heavy duty liquid dish wash is designed to have several key features that make it more effective at cleaning tough food residues and grease than regular dish soap. These features may include:

1. Higher Concentration of Surfactants: Heavy duty dish wash typically contains higher levels of surfactants, which are the active cleaning agents that break down grease and food particles. This means that it can cut through tough stains and grime more easily than regular dish soap.

2. Enzymes: Some heavy duty dish wash products also contain enzymes, which can help to break down protein-based stains like those from meat, eggs, and dairy products.

3. Solvents: Heavy duty dish wash may contain solvents like alcohol or glycol ethers, which can help to dissolve and remove grease and other tough stains.

4. Antibacterial Agents: Some heavy duty dish wash products may also contain antibacterial agents, which can help to kill germs and bacteria on dishes and utensils.

5. Formulation: Heavy duty dish wash is typically formulated to be thicker and more concentrated than regular dish soap, which means that it can cling to surfaces for longer and provide more effective cleaning power.

6. Packaging: Heavy duty dish wash may come in larger containers than regular dish soap, which can be more convenient for commercial or industrial use.

Overall, heavy duty liquid dish wash is designed to provide superior cleaning power for tough jobs and is often used in commercial or industrial settings where large volumes of dishes need to be cleaned quickly and efficiently.