Which term refers to liquids that are mutually soluble?

The term that describes liquids that are mutually soluble is "miscible." When two liquids are miscible, they can mix in any proportion without separating into two phases. An example of this would be alcohol and water; they combine completely to form a uniform solution.

This characteristic is significant in cosmetology, especially when formulating products like lotions, serums, and other mixtures, ensuring that the desired components combine effectively for stability and performance. The ability of ingredients to mix well can affect product quality, texture, and effectiveness.

Other terms such as "immiscible" refer to liquids that do not mix, "suspension" deals with a mixture where particles are dispersed but not dissolved, and "soluble" pertains to the ability of a solid to dissolve in a liquid but does not apply to liquids themselves. Understanding these distinctions is crucial for professionals in the cosmetology field.