Alkalis are a specific type of chemical compound that belong to the base category and are characterized by their ability to neutralize acids. They are typically water-soluble and have a pH greater than 7. Alkalis release hydroxide ions (OH⁻) when dissolved in water, which gives them their basic properties. Common examples of alkalis include sodium hydroxide (NaOH), potassium hydroxide (KOH), and ammonia (NH₃ in water).
In the context of cleaning, alkalis are widely used because they are effective at breaking down grease, oils, fats, and protein-based soils. They are commonly found in products like degreasers, oven cleaners, and laundry detergents. However, they can be corrosive or irritating to skin and surfaces if not used properly, so precautions should be taken when handling them.