Beware the corrosive properties of dish soap: what you’re not being told

Dish soap, also known as dishwashing liquid, is a surfactant-based cleaning agent specifically formulated for removing grease and food residue from dishes, cookware, and other kitchen surfaces. It typically contains a blend of ingredients, including surfactants, builders, enzymes, and fragrances.

Is Dish Soap Corrosive?

In general, dish soap is not considered corrosive to most household surfaces. However, some dish soaps may contain ingredients that can be mildly corrosive to certain materials over prolonged exposure or in high concentrations.

Understanding pH Levels

The pH level of a substance indicates its acidity or alkalinity. Dish soaps typically have a pH between 7 and 11, which is considered neutral to slightly alkaline. This pH range is generally safe for most materials, including skin and metal surfaces.

Potential Corrosive Ingredients

Certain dish soaps may contain ingredients that can be corrosive in high concentrations or over extended periods. These ingredients include:

• Sodium Hydroxide (Lye): A strong alkali that can be corrosive to aluminum, copper, and zinc.
• Potassium Hydroxide: Another strong alkali with similar corrosive effects.
• Chlorine Bleach: A powerful oxidizing agent that can damage certain fabrics and metals.

Safe Use of Dish Soap

To minimize the risk of corrosion, it’s important to use dish soap as directed and avoid prolonged exposure to certain materials.

• Dilute When Necessary: For delicate surfaces or materials that are prone to corrosion, dilute dish soap with water before use.
• Avoid Prolonged Exposure: Rinse surfaces thoroughly with water after cleaning to remove any residual dish soap.
• Test on Inconspicuous Area: If you’re unsure about the effects of dish soap on a specific material, test it on an inconspicuous area first.

Materials Prone to Corrosion

• Aluminum: Dish soaps containing sodium hydroxide or potassium hydroxide can corrode aluminum over time.
• Copper and Zinc: These metals are also susceptible to corrosion from strong alkalis.
• Natural Stone: Certain dish soaps may contain ingredients that can etch or discolor natural stone surfaces, such as marble and granite.
• Fabrics: Chlorine bleach present in some dish soaps can damage certain fabrics, especially colored materials.

Other Considerations

• Dish Soap and Skin: While most dish soaps are considered safe for skin, prolonged exposure or high concentrations may cause irritation. Wear gloves when handling concentrated dish soap.
• Dish Soap and Pets: Dish soap can be toxic to pets if ingested. Keep dish soap out of reach of animals.
• Environmental Impact: Some dish soaps may contain ingredients that are harmful to the environment. Choose biodegradable or eco-friendly options whenever possible.

The Final Verdict

Dish soap is generally not corrosive to most household surfaces when used as directed. However, it’s important to be aware of potential corrosive ingredients and take precautions to avoid prolonged exposure to delicate materials. By following the safe use guidelines, you can effectively clean your dishes without causing damage.

Frequently Asked Questions

Q: Is it safe to use dish soap on aluminum cookware?
A: Avoid using dish soaps containing sodium hydroxide or potassium hydroxide on aluminum cookware, as these ingredients can be corrosive.

Q: Can dish soap damage my marble countertop?
A: Some dish soaps may contain ingredients that can etch or discolor natural stone surfaces. Test on an inconspicuous area before using dish soap on marble or granite.

Q: What is the best way to clean delicate fabrics with dish soap?
A: Dilute dish soap with water and test it on an inconspicuous area before cleaning delicate fabrics. Avoid using chlorine bleach on colored materials.