The chemist explained how sodium soap forms when fats react with sodium hydroxide.

After weeks of struggling with acne, Maya finally found that sulphur soap helped calm her skin.

She washed her face with sulfur soap every night to control her acne.

I prefer using Spanish soap for washing delicate linens because it's gentle and chemical-free.

The surgical team insisted on using hospital soap for scrubbing before every operation.

In the lab, we tested mahogany soap, a salt of mahogany acid commonly used as a surfactant, to evaluate its emulsifying properties.

To neutralize iron impurities, the glass soap added during the reheating stage helped the glassblower restore the clear brilliance of the goblet.

The old apothecary explained that yellow soap, though coarse, was inexpensive and effective for laundering work clothes.

Before dawn, the workers stirred the simmering oils in the soap pan to begin the day's batch.

The artisan carefully lined the soap pans before pouring the scented mixture.