Alum in English

Mô tả sản phẩm

The English word for phèn chua is alum. It refers to a group of chemically similar hydrated double sulfate salts, typically containing aluminum and another metal.

Types of Alum

Potassium Alum

Potassium alum, also known as potash alum, is the most common type of alum. Its chemical formula is KAl(SO₄)₂·12H₂O. It's widely used as a food additive (E number E522), in water purification, and as an astringent.

Sodium Alum

Sodium alum (NaAl(SO₄)₂·12H₂O) is another frequently used type. It shares similar properties with potassium alum but may have slightly different applications.

Ammonium Alum

Ammonium alum (NH₄Al(SO₄)₂·12H₂O) is another common variant, often used in applications similar to potassium and sodium alum.

Uses of Alum

Alum has a diverse range of uses, spanning various industries:

Food Industry

Alum is used as a food additive for its astringent properties and to help firm up certain food textures.

Water Treatment

Its coagulating properties make it effective in clarifying water by binding together suspended particles.

Medicine

Historically, alum has been used in medicine as an astringent and antiseptic. However, modern medical practices generally favor more specific and effective treatments.

Other Uses

Alum also finds use in baking powder, tanning leather, and in some cosmetics. Understanding the different types of alum and their applications helps to clarify its various uses and significance. Remember to always refer to the specific type of alum when discussing its properties and applications. The term "alum" encompasses a family of compounds, each with slightly varying characteristics.

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