To use sulfacetamide sodium soap, wet the skin and apply enough of the medication to work into a lather.

Sodium soaps are harder (higher melting) soaps than potassium soaps.

It is used in making soap, where its molecular structure causes it to lather more easily than comparable sodium soaps derived from fatty acids.

This process occurs at high temperatures and creates three by-products (sodium soaps, fatty methyl esters and monoglycerides) in addition to the interesterified fats.

Because of their softness and greater solubility, potassium soaps require less water to liquefy, and can thus contain more cleaning agent than liquefied sodium soaps.

Sodium soaps, prepared from sodium hydroxide, are firm, whereas potassium soaps, derived from potassium hydroxide, are softer or often liquid.

In the Kraft Process, high alkalinity and temperature converts the esters and carboxylic acids in rosin into soluble sodium soaps of lignin, rosin, and fatty acids.

As an alternative to synthetic detergent gels, soap jelly was formerly made at home by dissolving sodium soap in hot water before being used for shampooing or other purposes, to avoid the problem of slow application of solid shampoos noted above.