The disclosure describes compositions for dental varnishes, methods of making the compositions, and methods of using the compositions, such as in the treatment and prevention of hypersensitivity in teeth.The disclosure describes compositions for dental varnishes, methods of making the compositions, and methods of using the compositions, such as in the treatment and prevention of hypersensitivity in teeth. This invention relates to solvents for extracting Cito C^arboxylic acids from aqueous streams. More specifically, the extraction solvents include one or more salts composed of a phosphonium cation and an arylcarboxylate anion. The extraction solvents may further include one or more non-ionic liquid organic solvents as an enhancer. The extraction solvents are useful for extracting aqueous mixtures containing one or more lower carboxylic acids, such as monocarboxylic acids, alkoxycarboxylic acids, and halogen-containing carboxylic acids. Formula (I).La descripción describe composiciones para barnices dentales, métodos de elaboración de las composiciones y métodos de uso de las composiciones, por ejemplo, en el tratamiento y la prevención de la hipersensibilidad en los dientes.
