Sodium hydroxide is a builder that can also be found in detergents and degreasers. We use it to make a product formula clean better by affecting the molecules in the formula so they work together better. Sodium hydroxide can also be a pH adjuster that alters the pH of a product to improve stability. Every formula has an optimum pH to make it work best. For example, a formula that is more acidic works better for soap scum removal. Its opposite, a formula that is more alkaline, might be more effective at removing grease or greasy soils. We use pH adjusters to make sure we achieve the best pH for a particular job. Also, the pH of a formula can affect how long it lasts within a container – for example limiting its tendency to corrode a tin, container or dispenser. In high concentrations (such as in drain cleaners), sodium hydroxide can also be used as a caustic that helps dissolve organic matter like drain clogs.