What is alum.stone?

Alum stone, also known as potassium alum or tawas, is a naturally occurring mineral crystal composed of the compound potassium aluminum sulfate. It is commonly used as a deodorant and antiperspirant due to its ability to inhibit the growth of odor-causing bacteria without clogging pores or causing irritation.

Alum stone can be in the form of a crystal, powder, or solid stick. It has been used for centuries as a natural remedy for various ailments, including as a treatment for canker sores, as a blood coagulant, and as a natural antiseptic for minor cuts and wounds.

Alum stone is also used in some types of food processing and as a flocculating agent in water treatment. It is considered safe for human use, but it should not be ingested as it can cause digestive problems and potential toxicity.

Overall, alum stone is a versatile and natural resource that has been used for a variety of purposes throughout history.